I'm going to assemble my first watches, with an ETA 2824-2 and one with a Valjoux 7750. The 7750 has a date wheel but not a day of the week wheel. Can I add the day wheel or do some 7750s take the wheel and others not?
From what I understand, if it's a pre ETA 7750 and not some other variant, if you look at the dial side, there could be the parts needed already to complete the task.
You need the day wheel, jumper, spring, and day star driving wheel.