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