Hamilton Jazzmaster Skeleton Auto 40mm H42535141
Best for: The shortest lug-to-lug here

8.1/10
Keep Score
- Crystal
- 2.5/2.5
- Serviceability
- 2.5/2.5
- Water resistance
- 0.6/1.5
- Warranty
- 0.7/1.5
- Strap standard
- 1/1
- Cost-to-keep transparency
- 0.8/1
#ad Affiliate link · Price as of October 8, 2026
42mm of lug-to-lug on a 40mm case is remarkable, and it is the lowest figure published by any dress watch on this site. The lugs barely extend past the case, so this wears far smaller than 40mm suggests — on a wrist under 150mm it still works.
Sapphire, 11.05mm thick, an 80-hour Hamilton H-10-S and a 20mm lug width, so any standard strap fits. 80 hours means it is still running on Monday if you take it off Friday night.
50m is the honest limit — an open dial is still a sealed case, but this is not a watch to swim in. And a skeleton dial is decoration, which this site generally argues against on a watch you intend to keep: it reads as contemporary now and will date. Hamilton publishes a European service list but no US figure.
42mm lug-to-lug on a 40mm case is remarkable — this is a skeleton watch that actually fits a normal wrist. 50m is the honest limit: an open dial is still a sealed case, but it is not a watch to swim in.
| Movement | Hamilton H-10-S, automatic, skeletonized |
|---|---|
| Power reserve | 80 hours |
| Case | 40mm stainless steel |
| Lug-to-lug | 42mm |
| Thickness | 11.05mm |
| Lug width | 20mm |
| Crystal | sapphire |
| Water resistance | 50m |
| Warranty | 2 years |
Specifications read from Hamilton product page, H42535141.








