Miyota 5R21

The Miyota 5R21 is a super-compact quartz movement manufactured in Japan by Miyota, the watch component division of Citizen. It measures just 1.9mm in height and operates as a 2-hand movement displaying only hours and minutes, with zero jewels. The movement offers an accuracy rating of ±20 seconds per month and delivers an approximate 48-month battery life. Miyota specifies this caliber for use exclusively in women's-sized watch cases.