Miyota GL12

Citizen (Miyota) · Quartz · Entry tier · Family: Miyota GL slim quartz

Three-hand quartz with date from Miyota's "Slim" line. Factory size 6¾ × 8 lignes (non-round, 15.30 × 17.80mm, so no single diameter is recorded), 2.71mm high, SR621SW (364) battery (size, height and battery from H.S. Walsh's parts listing). Accuracy (±20 s/month), battery life (3 years) and the two date positions, at 3 (GL12-10A) or at 6 (GL12-10Z), are from Miyota's GL12 page as shown in search results: the page itself answered "Under maintenance" (HTTP 503) on 2026-10-24, so re-check them against it. Jewel count not found.

Watches with the Miyota GL12

Watch	Price from	Movement	Dia. mm	Thick mm	Crystal	Micro-adjust
Militado ML17 (Miyota GL12, K1)	$69	Miyota GL12	36	9.4	K1 mineral	no bracelet
Militado ML17 (Miyota GL12, Sapphire)	$89	Miyota GL12	36	9.4	Sapphire	no bracelet

Sources

• Miyota, Cal. GL12 (official spec page; under maintenance when checked, values from the search index)
• H.S. Walsh, Miyota GL12 quartz watch movement with 6 o'clock date