Japanese original YN55A YN56A precision automatic mechanical movements Color:YN55 while the AR-coated mineral crystal

while the AR-coated mineral crystal minimizes reflections for optimal readability

Application: Complete watch case kit for custom builds

Bezel: Unidirectional Rotating GMT-Style Bezel (24-hour scale)

Compatible Dial Size: 28

The sapphire crystal with C3 luminous coating ensures visibility in low-light conditions

Japanese original YN55A YN56A precision automatic mechanical movements Color:YN55 while the AR-coated mineral crystalThe Epson YN55 and YN56 (often labeled as YN55A YN56A) are Japanese automatic, mechanical watch movements manufactured by Seiko Epson. If they look familiar, its because they are the unbranded supply market equivalents of Orients in house F6 calibers (the F6722 and F6922) which famously power watches like the Orient Mako and Ray lines. Epson sells these YN movements to third party microbrands (such as San Martin, Vostok Europe, and Guanqin) as an