Rare Problem with a Swiss 7750 Movement. Help!

[peyups]

It has a day and date wheel.. The problem is they do not change at the same time! The date wheel changes at 12:00am while the day wheel changes at 12:00pm VICE-VERSA, don't know which is correct obviously.

I disassembeled it and began re-installing the day wheel but it still changes the same way, the day or date wheel is 12hrs late/faster.. Only correct is they turn at 12.. but not the same time! Is this an easy fix or I let a watch maker fix it for me?

[Nanuq]

Let's wait for Ziggy to chime in on this one. I had a broken v72C movement and he looked long and hard for the right wheel, ultimately finding one that ticks over wrong, but it was the best solution for an otherwise unsolvable problem. He was able to explain in detail why he chose that exact part. I bet this is not too hard for him to explain either.

[peyups]

Its weird, this is first time I had this problem with a 7750 movement and over a swiss 7750 one. I think something must be reinstalled underneath the date-day wheels, the 2 small circles with a pointer that revolves. But what do I know!

[rckh]

It's not a problem!

There's a screw/gear which can adjust the change of date/day at the same time.

I had been told the above information by my watchsmith before.

I believe a skillfull watchsmith can help you to tune them.

Best Regards,

Raymond

[peyups]

I don't know which gear to move.. so I'll just be bringing this to a local watchsmith and see what he does about it.