Double Mainspring Multi-function Hollow Mechanical Movement Double Time ZoneDouble Mainspring Multi function Hollow Mechanical Movement Double Time Zone China made All dimensions are manually measured with a 5% data deviation.

Small Second At 6/9/12

#443 Watch Part Setting Lever Generic for SA100 Movement

High accuracy

7 mm (including handle)

Overall dimensions: 4" X 1

54in 16 x 45 x 90mm / 0

It's can fit for the original screws as the pictures

Sizes: 10-30mm

Fit for Seagull ST3600/ST3621/ETA6497/ETA6498 Manual Chain Up Movement

It's the top quality of the ST3621 Replacement brand new movement

Chinese Tianjin Seagull Mechanical Movement Black Balance Wheel Single Calendar

or choose according to your own preferences