Hi All, New to the forum. I have a Universal Geneve Reference 10370 from approx 1964, time only microtor no date in 18k gold case. The crown fell off and I have lost it. Now I need a replacement crown. Can anyone point me in the right direction in obtaining one. I would prefer an original crown but aftermarket will do if no other options. Is there a size i need to know for the crown? I know i need a screw on crown for it. Any info will help! Ill attach some photos. Thank you