26+ Omega 1120 Movement Accuracy US. Also the caliber 1120 is build around from a eta movement, would going to another professional watchmaker be just as good? The 1120 is a great, great movement and i've owned several 1120 equipped omega watches.
Its movement appears continuous and it can be read off the scale to within 1/10th of a second.
Omega speedmaster watchmaking demonstration | watchfinder & co. This is from an omega seamaster that i serviced. As a owner of the seamaster 300 pro with 1120 movement. Vacheron constantin movement cal 319246.