Horlobase
enfrde

Hamilton · Khaki Aviation

Hamilton Khaki Aviation Pilot Day Date Auto 42 mm (12.1 mm high)

Reference H64635140 · Tool · 42 mm

1212456789101114Ø 42 mm
Illustration drawn from the specifications: case to scale, colours and style approximate. Not a photo. Photos on the official page

Specifications

Reference
H64635140
Family
Khaki Aviation
Category
Tool
Status
Current
Case material
Stainless steel
Case diameter
42 mm
Case thickness
12.1 mm Official
Lug-to-lug
—
Lug width
20 mm Official
Water resistance
100 m
Bezel
—
Calibre
H-30 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.

1212456789101114No lug-to-lug dataFlat top of the wrist 54.1 mm
Top view on a wrist, to scale
Flat top of the wrist 54.1 mmNo lug-to-lug dataCase diameter 42 mm
Side view, across the wrist

No lug-to-lug figure exists for this reference yet, so fit cannot be computed.

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
12.1 mm Official Hamilton October 19, 2026

Lug-to-lug

No source gave this figure yet.

Lug width

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

Value Type Source Date
20 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.

  • H64635560 · green dial, cow leather strap

Other Khaki Aviation references

Watch Ø Thickness Lug-to-lug Calibre
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 - Air-Glaciers Edition H64655941 42 mm 12.1 mm — H-30
Khaki Aviation X-Wind Day Date Auto 45 mm H77735560 45 mm 12.8 mm 54 mm H-30
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 Aviation X-Wind GMT Chrono Quartz 46 mm H77912135 46 mm 13.75 mm — G10.962
Khaki Aviation X-Wind Auto Chrono 45 mm H77916920 45 mm 14.85 mm — H-21-Si
Khaki Aviation Takeoff Auto Chrono - Limited Edition H76776733Discontinued 46 mm 15.95 mm — H-31

Other Hamilton models

Watch Ø Thickness Lug-to-lug Calibre
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 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
Show 37 more
Watch Ø Thickness Lug-to-lug Calibre
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 Field Auto 42 mm (steel, 10.65 mm high) H70605943Discontinued 42 mm 10.65 mm 53 mm H-10
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 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 Field Auto 40 mm H70595133Discontinued 40 mm 11.5 mm — H-10
Khaki Field Expedition Auto 37 mm H70225110 37 mm 11.45 mm — H-10
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 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 Chrono 42 mm H71626735 42 mm 14.5 mm 51 mm H-21
Khaki Navy Scuba Auto GMT Bronze 43 mm H82565930 43 mm 13.9 mm 52 mm H-14
Khaki Navy Scuba Auto 40 mm H82415130 40 mm 12.95–13 mm — H-10
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 Navy Frogman Auto 46 mm H77825330 46 mm 13.58 mm — H-10
American Classic Spirit of Liberty Auto 42 mm H42415541 42 mm 11.4 mm — H-10
Jazzmaster Open Heart Auto 42 mm H32705041 42 mm 11.4–11.44 mm 50 mm H-10
Pan Europ Day Date Auto H35405741 42 mm 11.85 mm — H-30
Khaki Navy BeLOWZERO Auto Titanium 46 mm H78505330 46 mm 15.7 mm 55 mm H-10
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
Jazzmaster Skeleton Auto 40 mm H42535141 40 mm 11.05 mm 42 mm H-10-S
Jazzmaster Open Heart Auto 36 mm H32215101 36 mm 10 mm 42 mm H-10
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

← All watches