Seiko NH38A

Seiko Instruments (TMI) · Automatic · Entry tier · Family: Seiko NH3x

NH38 = NH35 without the date: a true no-date three-hander (TMI lists it as "Three Hands" with no calendar function, so no phantom crown position). TMI spec sheet: 12 lignes, Ø27.40mm (Ø29.36mm with the dial holding spacer), 5.32mm high, 24 jewels, 21,600 vph, power reserve "more than 41 hours", accuracy -20 to +40 s/day (23 ±2 °C), manual winding, ball-bearing automatic winding in both directions, second-hand stop (hacking). Country of origin "Japan or Malaysia".

Watches with the Seiko NH38A

Watch	Price from	Movement	Dia. mm	Thick mm	Crystal	Micro-adjust
Pagani Design PD-1719	$171	Seiko NH38A	42.5	14	Sapphire	—
Islander Automatic Open-Heart Watch with Pinstripe Dial	$199	Seiko NH38A	39	11.5	Sapphire	no bracelet
Islander Automatic Watch (NH38)	$199	Seiko NH38A	40	12.5	Sapphire	—
Islander Aviator Automatic (NH38)	$199	Seiko NH38A	42	12	Sapphire	no bracelet
Islander Mitchel Automatic Field Watch (NH38)	$249	Seiko NH38A	39	12	Sapphire	—
Islander Hawkeye	$269	Seiko NH38A	39	11.5	Sapphire	—
Hemel Gallant	$300	Seiko NH38A	40	13	Sapphire	—
Islander 38mm Automatic Dive Watch (NH38)	$329	Seiko NH38A	38	13	Sapphire	—
Islander Rocktopus Limited Edition	$329	Seiko NH38A	42	13.2	Sapphire	—
Islander Roslyn	$329	Seiko NH38A	41.5	13.7	Sapphire	—
Islander Red October V2	$349	Seiko NH38A	42	15	Sapphire	—
Waldhoff Regent	$368	Seiko NH38A	42	12.5	Sapphire	—
Islander Thunderbolt	$369	Seiko NH38A	40	12.5	Sapphire	—
KUOE Old Smith 90-002 35mm	$378	Seiko NH38A	35	12.35	Sapphire	—
KUOE Old Smith 90-002 38mm	$378	Seiko NH38A	38	11.8	Sapphire	no bracelet
Islander Random Monster	$379	Seiko NH38A	42.5	13.5	Sapphire	Tool-free
Islander Sands Point Titanium Diver (NH38)	$395	Seiko NH38A	43	14	Sapphire	no bracelet
Signum Cuda Steel 42.5mm (NH38)	$399	Seiko NH38A	42.5	13.6	Sapphire	—
Signum Cuda Titanium (NH38)	$399	Seiko NH38A	42.5	13.4	Sapphire	Tool (pin holes)
Zelos Swordfish Field 38mm Bronze	$399	Seiko NH38A	38	12	Sapphire	no bracelet
Zelos Swordfish Field 38mm SS	$399	Seiko NH38A	38	12	Sapphire	—
KUOE Old Smith 90-002 35mm Bronze	$441	Seiko NH38A	35	12.95	Sapphire	no bracelet
KUOE Old Smith 90-002 38mm Bronze	$441	Seiko NH38A	38	12.95	Sapphire	no bracelet
Zelos Hammerhead 43 Field (bronze)	$499	Seiko NH38A	43	13	Sapphire	—
Zelos Hammerhead 43 Field (steel)	$499	Seiko NH38A	43	13	Sapphire	On-the-fly
Isotope Goutte d'Eau (NH38)	$505	Seiko NH38A	40	13.4	Sapphire	—
Nodus Sector II Sport	$525	Seiko NH38A	38	11.7	Sapphire	On-the-fly
Geckota Pioneer	$532	Seiko NH38A	41.5	12.05	Sapphire	—
Imperial Watch Co. Rangefinder	$539	Seiko NH38A	38	14	Sapphire	On-the-fly
Tsao Baltimore UMD Cole Field House	$550	Seiko NH38A	40	13.2	Sapphire	—
MKII Cruxible Hellion Non-date (satin)	$595	Seiko NH38A	39	13.55	Sapphire	no bracelet
Nodus Sector II Field Titanium Cerakote Edition	$600	Seiko NH38A	38	11.7	Sapphire	no bracelet
Nodus Sector II Field Titanium	$625	Seiko NH38A	38	11.7	Sapphire	On-the-fly
Nodus Obscura II	$650	Seiko NH38A	40	11.7	Sapphire	On-the-fly

Sources

• Time Module (TMI), NH38A watch movement specification and drawing (rev. 16.11.2022)
• Time Module (TMI), Mechanical (NH0 & NH3) product line-up