Bergeon 31081-EX-7750 tool to adjust the excentric screw of calibre ETA / VALJOUX 7750. Tool for setting the 0-position of the minute counter wheel.
Can be used with following calibers: ETA 7750, 7751, 7753, 7754, 7757, 7760, 7761, 7765, 7768, 7770, A07.211