Features: and high quality. Product material is strong, , long service life. Can be used as a spare parts to facilitate the replacement of your movement. Color: Silver Material: metal Model: For VK63A Outside diameter: 30.8mm Casing diameter: 29.0mm Height: 5.10mm Date position: H3 Note: it's better to ask a professioanl watchmaker to check it if don't know how to use it.thanks For VK63 user guide: Left small circle (time minute hand) Right small circle (24-hour system) Small circle (daily second hand) Big three needles (hour/minute hand is a regular needle) The second hand is used for timing. The second hand is used for timing. The first button on the top right (timing start) and the second button on the bottom right (timing reset) adjust the time/calendar. Rotate the head out and slightly pull the second gear to adjust the calendar. Pull the third gear to adjust the hour/minute hand. Package Contents: 2 x Watch Movement Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.