Help identifying a specific 7750 movement

[Dave2302]

Looking for a bit of help please re my used "bitza" Daytona, which is still running fine and I am still happy with it at the price I paid

I have read and looked at the excellent article by @dogwood , including studying his pictures at the bottom of post #1 here :-

Comprehensive Guide to Clone Movements Found in Rolex Reps

Change Log: August 25th 2022 - Initial version published on r/RepTime March 9th 2023 - Updated version published on RWI. Updated to include information about the new SH3285 found in C+ Factory GMTs and DD3285 found in Clean Factory GMTs. March 14th 2023 - Update to include a link to Steve's...

forum.replica-watch.info

I am now reasonably certain that this is a clone 7750, please jump on me to correct me if wrong.

What else I can tell you that is relevant:-

IMHO it is a "newer" A7750 as it is running at 28800 Beat.
Sub Dials are slightly higher than 3 & 6 markers on the watches Dial.
It runs Sec @ 6
Chrono is fully functional.
I was told it was a Dandong Movement.

The reason I am needing to know exactly which clone movement is I would like to do a hand swap via a UK Watchmaker and I understand that the Sub hands and the Centre Chrono Sec hands are different sizes on some 7750's.
So I don't want to waste the UK Watchmakers time nor my own, by supplying the wrong hands. I have alredy bought a set of regular Daytona Hands from Ali, but now I'm not certain if this set is correct spindle sizes. It is mainly the centre (chrono) second hand that I am wanting to change.

I am unable to find the "less popular" sized (smaller spindle) hand set, so if anyone knows a source I would also be grateful for that info.






If ya's have got this far, thank you for reading and any help will be gratefully received.

 

[dogwood]

Yes it's a 7750. I'm not sure which factory produced it (Dandong or Shanghai or other...). Within reason you can adjust the tube size of a hand by broaching it open or squeezing it into an oval to close it.

 

[Dave2302]

Thank you for the reply, it is much appreciated.

My assumption, (yes I know what assumption is the mother of lol), but I assume that the Ali Handset is gonna be for the earlier Aisian 21,600 BPH Movement,

I think, (now I've re read a lot) that it is likely only the Centre Sec Hand that will be loose, 0.25 as opposed to 0.20

So, now I actually have the handset here I think the best bet will be for me to contact the watchmaker and see if he can do that, as it is the centre second hand that is incorrect for this watch, and also I have got the set of 3 Red subdial hands, with red Centre second, to give me a better contrast with the white dial, as the existing hand set is silver.

Once again thanks

If anyone else has any info I should know please feel free to post up