Hamilton Khaki Navy

Most Hamilton Khaki Navy references take a 20 mm watch strap: 44 of 101. The lug width follows the case size: 37 mm case → 18 mm, 40 mm case → 20 mm, 41 mm case → 20 mm and 42 mm case → 21 mm.

Shop 18 mm Shop 20 mm Shop 21 mm Shop 22 mm Shop 24 mm

Hamilton Khaki Navy lug width by case size

101 references measured. Updated 2026-10-30.

Case	Lug width	Buckle width	References	Watch strap attachment	For example
37 mm	18 mm	—	12	—	H77311115, H77311615, H77311815
40 mm	20 mm	18 mm	26	—	H74511133, H74511333, H74531863
41 mm	20 mm	—	11	—	H64511133, H64511733, H64515133
42 mm	21 mm · 22 mm on 9 · 20 mm on 1	—	27	—	H64512132, H64512332, H64512352
43 mm	22 mm · 20 mm on 2 · 21 mm on 1	20 mm	10	—	H82505140, H82505150, H82515130
44 mm	22 mm	—	1	—	H77706553
46 mm	24 mm	—	9	—	H78505330, H78515333, H78515353
not recorded	20 mm · 22 mm on 1	—	5	—	H78615135, H78615335, H78615355

References that take a different watch strap

H77565833: 20 mm, not the 21 mm of most 42 mm cases
H77636143: 22 mm, not the 21 mm of most 42 mm cases
H77636343: 22 mm, not the 21 mm of most 42 mm cases
H78545333: 22 mm, not the 21 mm of most 42 mm cases
H78555133: 22 mm, not the 21 mm of most 42 mm cases
H78555333: 22 mm, not the 21 mm of most 42 mm cases
H78555353: 22 mm, not the 21 mm of most 42 mm cases
H78555533: 22 mm, not the 21 mm of most 42 mm cases
H78555553: 22 mm, not the 21 mm of most 42 mm cases
H78595913: 22 mm, not the 21 mm of most 42 mm cases
H77715553: 21 mm, not the 22 mm of most 43 mm cases
H78716333: 20 mm, not the 22 mm of most 43 mm cases
H78716983: 20 mm, not the 22 mm of most 43 mm cases
H77505535: 22 mm

Questions about the Hamilton Khaki Navy

Do all Hamilton Khaki Navy case sizes take the same watch strap?

No. The lug width changes with the case size: the 37 mm case takes 18 mm, the 40 mm case takes 20 mm, the 41 mm case takes 20 mm, the 42 mm case takes 21 mm and the 43 mm case takes 22 mm. Check your case diameter before you buy.

Can two Hamilton Khaki Navy watches with a 42 mm case take different watch straps?

Yes. Of the 27 Hamilton Khaki Navy references with a 42 mm case, 17 take 21 mm, 9 take 22 mm and 1 take 20 mm. The reference number decides, not the case size alone.