Seiko 6R15A Parts List/Technical Manual page 11

TECHNICAL GUIDE
● How to remove the winding stem
1) Set the winding stem to normal position.
2) Pull out the winding stem, while pushing "A".
● Disassembling/Reassembling of the First reduction wheel
<< Disassembling >>
49
Winding stem
31
Reduction wheel holder
29
Barrel and train wheel bridge (back side)
11/16
A
47
Setting lever
<< Assembling >>
Cal.6R15A/B