Hamilton · Jazzmaster Open

Hamilton Jazzmaster Open Heart Auto 42 mm

Reference H32705041 · Classic · 42 mm

Version (13 drawn)

Illustration drawn from the specifications: case to scale, colours and style approximate. Not a photo. Photos on the official page

Specifications

Reference: H32705041
Family: Jazzmaster Open
Category: Classic
Status: Current
Case material: Stainless steel
Case diameter: 42 mm
Case thickness: 11.4–11.44 mm 2 sources
Lug-to-lug: 50 mm Official
Lug width: 22 mm Official
Water resistance: 50 m
Bezel: —
Calibre: H-10 Official
Power reserve: 80 h

Official product page · retrieved October 19, 2026

Does it fit your wrist?

Enter your wrist circumference. The watch appears to scale on the flat top of the wrist.

Wrist circumference

Top view on a wrist, to scale

Side view, across the wrist

Comfortable

Lug-to-lug 50 mm on a flat top of 54.1 mm: 92 % of the width.

Lug-to-lug is 75 to 95% of the flat top, the usual comfortable range.

Measurements and sources

Brands rarely publish thickness, lug width and lug-to-lug together. Each observation below is kept separate, with who gave it.

Case thickness

Value	Type	Source	Date
11.4 mm	Official	Hamilton	October 19, 2026
11.44 mm	Official	Hamilton	October 19, 2026

Lug-to-lug

Value	Type	Source	Date
50 mm	Official	Hamilton	October 19, 2026

Lug width

Lug width is the gap between the lugs, where the strap fits. It is not lug-to-lug.

Value	Type	Source	Date
22 mm	Official	Hamilton	October 19, 2026

Calibre source

Official Hamilton · retrieved October 19, 2026

Other versions in the same case

These references differ only by dial, bracelet or bezel colour. The brand gives them the same case dimensions, so the figures on this page apply to them too.

H32705121 · beige dial, stainless steel bracelet
H32705131 · black dial, stainless steel bracelet
H32705140 · blue aventurine dial, stainless steel bracelet
H32705141 · blue dial, stainless steel bracelet
H32705160 · green dial, stainless steel bracelet
H32705180 · silver dial, stainless steel bracelet
H32705181 · grey dial, stainless steel bracelet
H32705501 · champagne dial, calf leather strap
H32705521 · beige dial, cow leather strap
H32705560 · green dial, calf leather strap
H32705640 · blue aventurine dial, calf leather strap
H32705731 · black dial, calf leather strap

Other Jazzmaster Open references

Watch	Ø	Thickness	Lug-to-lug	Calibre
Jazzmaster Open Heart Auto 36 mm H32215101	36 mm	10 mm	42 mm	H-10

Other Hamilton models

Watch	Ø	Thickness	Lug-to-lug	Calibre
American Classic Spirit of Liberty Auto 42 mm H42415541	42 mm	11.4 mm	—	H-10
Pan Europ Day Date Auto H35405741	42 mm	11.85 mm	—	H-30
Jazzmaster Day Date Auto 40 mm H32505131	40 mm	11.52 mm	—	H-40
Jazzmaster Gent Quartz 40 mm H32451141	40 mm	10.2 mm	—	F06.111
Jazzmaster Open Heart Auto 40 mm H32675141	40 mm	10.8–11.1 mm	50 mm	H-10
Jazzmaster Quartz 40 mm H32461121	40 mm	7.8 mm	—	F06.105

Show 44 more

Watch	Ø	Thickness	Lug-to-lug	Calibre
Jazzmaster Skeleton Auto 40 mm H42535141	40 mm	11.05 mm	42 mm	H-10-S
Jazzmaster Quartz 32 mm H32301141	32 mm	7.8 mm	—	F05.105
Jazzmaster Skeleton Auto 36 mm H32405111	36 mm	10.9 mm	—	H-10-S
Khaki Aviation Pilot Day Date Auto 42 mm (11.85 mm high) H64615135	42 mm	11.85 mm	—	H-40
Khaki Aviation Pilot Day Date Auto 42 mm (12.1 mm high) H64635140	42 mm	12.1 mm	—	H-30
Khaki Field Auto 42 mm (steel, 11 mm high) H70515137	42 mm	11 mm	53 mm	H-10
Khaki Field Mechanical 42 mm H69529913	42 mm	9.9 mm	—	H-50
Khaki Field Murph 42 mm H70605731	42 mm	11 mm	53 mm	H-10
Khaki Aviation Pilot Day Date Auto - Air-Glaciers Edition H64655941	42 mm	12.1 mm	—	H-30
Khaki Field Auto 42 mm (titanium) H70545140	42 mm	11.45 mm	—	H-10
Khaki Field Expedition Auto 41 mm H70315110	41 mm	11.5 mm	—	H-10
Khaki Field King Auto 40 mm H64455133	40 mm	11.15 mm	—	H-40
Khaki Field King Day Date 40 mm H64475131	40 mm	11.8 mm	50 mm	H-40
Khaki Field Power Reserve 40 mm H69509110	40 mm	11.95–12 mm	48 mm	H-23
Khaki Field Quartz 40 mm (calibre F07.111) H68551933	40 mm	9.6 mm	—	F07.111
Khaki Field Quartz 40 mm (calibre F07.115) H68401735	40 mm	9.6 mm	—	F07.115
Khaki Aviation X-Wind Day Date Auto 45 mm H77735560	45 mm	12.8 mm	54 mm	H-30
Khaki Field Auto 42 mm (steel, 10.65 mm high) H70605943Discontinued	42 mm	10.65 mm	53 mm	H-10
Khaki Field Auto Chrono 42 mm H71626735	42 mm	14.5 mm	51 mm	H-21
Khaki Field Auto The Odyssey Limited Edition H70675530Discontinued	42 mm	10.9 mm	—	H-10
Khaki Field Auto 38 mm H70455533	38 mm	11 mm	47 mm	H-10
Khaki Field Mechanical 38 mm H69439931	38 mm	9.5 mm	47 mm	H-50
Khaki Field Murph 38 mm H70405730	38 mm	11–11.1 mm	44.7 mm	H-10
Khaki Field Quartz 38 mm H69401110	38 mm	8.3 mm	46 mm	F06.105
Khaki Navy Scuba Auto 43 mm H82505140	43 mm	12.58 mm	—	H-10
Khaki Navy Scuba Auto GMT 43 mm H82555130	43 mm	13.9 mm	52 mm	H-14
Khaki Field Auto 38 mm (titanium, 11.45 mm high) H70205830	38 mm	11.45 mm	46 mm	H-10
Khaki Field Auto 38 mm (titanium, 11.68 mm high) H70205140	38 mm	11.68 mm	46 mm	H-10
Khaki Field Mechanical Bronze 38 mm H69459510	38 mm	9.6 mm	—	H-50
Khaki Navy Scuba Auto GMT Bronze 43 mm H82565930	43 mm	13.9 mm	52 mm	H-14
American Classic Intra-Matic Auto Chrono 40 mm H38416111	40 mm	14.45 mm	49 mm	H-31
Intra-Matic Chronograph H H38429541	40 mm	14.35 mm	49 mm	H-51
Khaki Aviation Converter Air Zermatt Limited Edition H76706730Discontinued	44 mm	14.6 mm	—	H-21-Si
Khaki Aviation X-Wind Auto Chrono 44 mm H77506540	44 mm	15.55–15.6 mm	55 mm	H-21
Khaki Field Auto 40 mm H70595133Discontinued	40 mm	11.5 mm	—	H-10
Khaki Navy Scuba Auto 40 mm H82415130	40 mm	12.95–13 mm	—	H-10
Khaki Field Expedition Auto 37 mm H70225110	37 mm	11.45 mm	—	H-10
Khaki Aviation X-Wind Auto Chrono 45 mm H77916920	45 mm	14.85 mm	—	H-21-Si
Khaki Field Mechanical 36 mm H69399930	36 mm	10.2 mm	46 mm	H-50
Khaki Field Quartz 33 mm H69301110	33 mm	7.55 mm	41 mm	F05.105
Khaki Aviation X-Wind GMT Chrono Quartz 46 mm H77912135	46 mm	13.75 mm	—	G10.962
Khaki Navy Frogman Auto 46 mm H77825330	46 mm	13.58 mm	—	H-10
Khaki Navy BeLOWZERO Auto Titanium 46 mm H78505330	46 mm	15.7 mm	55 mm	H-10
Khaki Aviation Takeoff Auto Chrono - Limited Edition H76776733Discontinued	46 mm	15.95 mm	—	H-31

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