Essential part on the bay for 1570 franken projects

[stilty]

120419163327

Here is a vital part for the 1570 movement for anyone who is planning on building a Franken 1680 or 1665 and using a movement salvaged from a 1601 or 1603 Datejust. If you are using a salvage from a 1500 OP Date, then you will be fine.

Why you ask? The date disc seat on the 1570 for DJ is beveled for the pie pan dial, and the diameter is too large to fit in the sport case. You will not be able to fit the movement to the case. The only other fix is to grind down the part in order to fit, or replace with the proper seat. Something to keep in mind if shopping for a 1570 on the bay and you see a seller listing a 1570 from a 1601 and saying it will fit a 1680. It will not fit.

I recall The Zigmeister posting this problem a while back while assembling a Franken and he had to grind the seat to the proper diameter in order to fit the case.

[freddy333]

I recall Ziggy posting this problem a while back while assembling a Franken and he had to grind the seat to the proper diameter in order to fit the case.

Correct & I ran into the same problem with my double red. While modding the existing part is not a problem, it might be easier (& less chancy) for most to just swap theirs out with this part. Nice find, Stilty.