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Dial&Lug
The bezel of a steel dive watch photographed close up

Is the Kamasu worth it?

Is the Orient Kamasu worth it?

The Kamasu is the watch this site calls the best value it has found. Here is what that value is made of, and the one thing it does not include.

By Sawyer V. · Published

The short answer

Yes. The Kamasu puts a sapphire crystal, 200m, a screw-down crown and an in-house automatic that hacks and hand-winds in one watch, with a three-year warranty. What it does not give you is a published service price — Orient publishes none in the US. The Seiko Turtle is the alternative if that matters more.

The Kamasu's reputation rests on one comparison: at a tier where Seiko still fits Hardlex, it has sapphire. Add 200m, a screw-down crown, an in-house movement that hacks and hand-winds, and a three-year warranty longer than Hamilton's or Tissot's, and it scores 9.0 — the highest score on this site outside Seiko's 6R models.

The case against it is short: 40 hours of reserve, and no published service price, so the cost of keeping it is a quote rather than a number. The Kamasu vs Turtle comparison weighs exactly that.

On prices: we publish no figure we have not verified today, so every buy button reads "Check price on Amazon". Service prices quoted here are the manufacturers' own published figures.

How we picked

We have not worn these watches. What follows is what we checked instead, on documents you can open yourself — the same criteria, in the same order, on every roundup on this site. The full method is on the methodology page.

  1. 01Crystal

    Sapphire — the thing rivals at its tier tend to leave out.

  2. 02Movement

    Orient's in-house F6922: hacking, hand-winding, 40 hours.

  3. 03Water resistance

    200m, with a screw-down crown.

  4. 04Warranty

    Three years.

  5. 05Service

    Orient publishes no US service price list.

Disclosure · Some links below are Amazon affiliate links. If you buy through one we earn a commission at no extra cost to you. It does not decide what goes on this page or in what order — here is exactly how that works.

Quick picks

Ranked on the Keep Score below — six published specifications, weighted identically on every page. The last row is the one we would not buy.

#WatchBest forKeep ScorePrice
1

Seiko Prospex SPB453J1

Sapphire, 300m, 72 hours, published accuracy.

If you can step up two tiers9.6/10
Check price
2

Orient Kamasu RA-AA0004E39B

Sapphire, 200m, screw-down crown, in-house automatic.

Worth it — the value pick9.0/10
Check price
3

Seiko Prospex Turtle SRPE93

Diver's 200m, 4R36, $176 overhaul.

If you want a known service price8.4/10
Check price
4

Baltic Aquascaphe Classic

39mm, 200m, sapphire crystal and bezel.

If you want it smaller7.7/10
Direct only
5

Citizen Promaster Diver BN0150-28E

Solar, 200m, five years.

If you never want to wind or service it6.8/10
Check price
—

Spinnaker Bradner SP-5062-33

Sapphire and 18 ATM — at 15mm thick with a 50mm lug-to-lug.

Skip this one

Not as the Kamasu alternative8.0/10
Check price

Keep Score is arithmetic, not opinion — six published specifications, weighted the same way on every page. The formula is on our methodology page, so you can re-run it yourself.

01

Seiko Prospex SPB453J1

Best for: If you can step up two tiers

9.6/10

Keep Score

Crystal
2.5/2.5
Serviceability
2.5/2.5
Water resistance
1.5/1.5
Warranty
1.05/1.5
Strap standard
1/1
Cost-to-keep transparency
1/1
Check price on Amazon

#ad Affiliate link · We publish no price we have not verified today

Everything the Kamasu has plus a 72-hour 6R55, a published accuracy tolerance, 300m and a published $296 overhaul, in a 40mm case.

It sits two tiers higher, in our under-$2,000 tier.

300m and a 46.4mm lug-to-lug in the same watch is unusual. The extender in the clasp is the detail that says Seiko still expects this one to be dived, not just worn.

Manufacturer specifications for the Seiko Prospex SPB453J1
MovementSeiko 6R55, automatic with manual winding, 24 jewels, +25/-15 sec per day
Power reserve72 hours
Case40mm stainless steel
Lug-to-lug46.4mm
Thickness13mm
Lug width20mm
Crystalsapphire
Water resistance300m
Warranty3 years

Specifications read from Seiko Watch Corporation product page, SPB453J1.

02

Orient Kamasu RA-AA0004E39B

Best for: Worth it — the value pick

9.0/10

Keep Score

Crystal
2.5/2.5
Serviceability
2.5/2.5
Water resistance
1.5/1.5
Warranty
1.05/1.5
Strap standard
1/1
Cost-to-keep transparency
0.4/1
Check price on Amazon

#ad Affiliate link · We publish no price we have not verified today

Sapphire, 200m and a screw-down crown around a hacking, hand-winding in-house F6922, with a three-year warranty and a published 46.8mm lug-to-lug.

40 hours of reserve and no US service price list are the costs.

On paper this is the best value in the category and it is not close: sapphire and a hacking, hand-windable in-house caliber at a price where Seiko still fits Hardlex. Orient's three-year warranty is longer than Hamilton's or Tissot's.

Manufacturer specifications for the Orient Kamasu RA-AA0004E39B
MovementOrient F6922 in-house automatic, hand-winding, hacking
Power reserve40 hours
Case41.8mm stainless steel
Lug-to-lug46.8mm
Thickness12.8mm
Lug width22mm
Crystalsapphire
Water resistance200m
Warranty3 years

Specifications read from Orient Watch USA product page, RA-AA0004E39B.

03

Seiko Prospex Turtle SRPE93

Best for: If you want a known service price

8.4/10

Keep Score

Crystal
1.3/2.5
Serviceability
2.5/2.5
Water resistance
1.5/1.5
Warranty
1.05/1.5
Strap standard
1/1
Cost-to-keep transparency
1/1
Check price on Amazon

#ad Affiliate link · We publish no price we have not verified today

The Turtle gives up sapphire for a published $176 overhaul on the most widely serviced caliber in the US, and it carries the diver's marking.

Hardlex, and a 45mm cushion case.

Seiko rates this at 200m as a diver's watch, not merely water-resistant — screw-down crown, screw case back, unidirectional bezel. The 45mm figure is misleading: the cushion case has no protruding lugs.

Manufacturer specifications for the Seiko Prospex Turtle SRPE93
MovementSeiko 4R36, automatic with manual winding, 24 jewels
Power reserve41 hours
Case45mm stainless steel
Lug-to-lugNot published
Thickness13.4mm
Lug width22mm
Crystalhardlex
Water resistance200m
Warranty3 years

Specifications read from Seiko Watch Corporation product page, SRPE93.

04

Baltic Aquascaphe Classic

Best for: If you want it smaller

7.7/10

Keep Score

Crystal
2.5/2.5
Serviceability
2.5/2.5
Water resistance
1.5/1.5
Warranty
0/1.5
Strap standard
1/1
Cost-to-keep transparency
0.2/1
Sold direct by Baltic

We earn nothing on this link. Baltic sells it directly.

A 39mm, 200m diver with a sapphire bezel insert as well as a sapphire crystal.

Baltic states no warranty term on the page we read. Sold direct; we earn nothing on this link.

The sapphire bezel insert is the part that matters for keeping: aluminum inserts fade and ceramic chips, and this does neither. Baltic sells direct, so there is no buy button here from us.

Manufacturer specifications for the Baltic Aquascaphe Classic
MovementMiyota 9039 automatic
Power reserve42 hours
Case39mm 316l stainless steel
Lug-to-lug47mm
Thickness13mm
Lug width20mm
Crystalsapphire
Water resistance200m
WarrantyNot stated by the manufacturer

Baltic does not state a warranty term on this product page.

Specifications read from Baltic Watches product page, Aquascaphe Classic.

05

Citizen Promaster Diver BN0150-28E

Best for: If you never want to wind or service it

6.8/10

Keep Score

Crystal
1/2.5
Serviceability
1.4/2.5
Water resistance
1.5/1.5
Warranty
1.5/1.5
Strap standard
1/1
Cost-to-keep transparency
0.4/1
Check price on Amazon

#ad Affiliate link · We publish no price we have not verified today

A 200m solar diver with Citizen's five-year warranty and nothing to maintain.

Mineral glass — the one thing the Kamasu clearly does better.

The strongest argument for this watch is the one Citizen makes on its own page: nothing to replace, five years of cover. The argument against it is the mineral crystal, which will scratch where sapphire would not.

Manufacturer specifications for the Citizen Promaster Diver BN0150-28E
MovementCitizen E168 Eco-Drive, light-powered
Power reserveNot published
Case44mm stainless steel
Lug-to-lugNot published
ThicknessNot published
Lug width20mm
Crystalmineral
Water resistance200m
Warranty5 years

Citizen's five-year limited warranty excludes the power cell, case, bracelet and strap.

Specifications read from Citizen Watch product page, BN0150-28E.

Skip this one

Spinnaker Bradner SP-5062-33

Best for: Not as the Kamasu alternative

8.0/10

Keep Score

Crystal
2.5/2.5
Serviceability
2.5/2.5
Water resistance
1.1/1.5
Warranty
0.7/1.5
Strap standard
1/1
Cost-to-keep transparency
0.2/1
Check price on Amazon

#ad Affiliate link · We publish no price we have not verified today

The Bradner is the other sapphire diver people cross-shop at this tier, with a screw-lock crown, 18 ATM and a stated two-year warranty.

It is 15mm thick with a 50mm lug-to-lug, and Spinnaker does not name the caliber. Against the Kamasu's 12.8mm, 46.8mm and named in-house movement, it loses on every line but the crystal they share.

Sapphire and a stated two-year warranty at this price is a good trade. 15mm thick and 50mm across the lugs is not — this is a big watch, and the spec sheet says so plainly.

Manufacturer specifications for the Spinnaker Bradner SP-5062-33
MovementJapanese automatic, three hands with date
Power reserveNot published
Case42mm stainless steel
Lug-to-lug50mm
Thickness15mm
Lug width20mm
Crystalsapphire
Water resistance180m
Warranty2 years

Spinnaker states a two-year international warranty on this product page.

Specifications read from Spinnaker product page, SP-5062-33.

Who should buy something else

  • If you want to know the service cost in advance: the Seiko Turtle, at a published $176.
  • If you want a longer reserve: a 6R Seiko, or an 80-hour Tissot or Hamilton — 40 hours will not carry the Kamasu from Friday evening to Monday morning.
  • If 41.8mm is too big: the Baltic Aquascaphe, at 39mm.

Orient's whole range is on Orient, and every value pick on best value watches.

Questions people actually ask

Is the Orient Kamasu worth it?

Yes: sapphire, 200m, a screw-down crown and an in-house hacking automatic with a three-year warranty. Its only real gaps are a 40-hour reserve and no published US service price.

Is the Kamasu better than the Seiko Turtle?

It has the better specification — sapphire against Hardlex, and a published 46.8mm lug-to-lug. The Turtle has the better future: a diver's marking and a published $176 overhaul.

Does the Kamasu hack and hand-wind?

Yes. Orient states both for the F6922 on its product page.

How long is the Kamasu's warranty?

Three years, as Orient states — longer than Hamilton's or Tissot's two.

Sources

Every specification and figure on this page came from one of these documents. Where a manufacturer does not publish something, the page says so rather than filling the gap.

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