Hi!
Do you know by any chance if the calendar disc in cal. 613 has any equivalents in other calibres? Is it interchangeable with any other?

 

Yes it is, but you need to which ring you have. There is a domed and a flat. Parts supplier will be able to tell you based on the case number

I'm thinking yours is the flat version as domed is black and flat is white

Flat from 561, 564, 565

I would still check with a parts supplier to be 100% sure though

DON

 

From my own experience, dome is silverish, flat is white.
It doesn't matter it is a 561/564 or 562,
Don is correct, the case ref will decides domed or flat.
For example, a 168.005 will take a domed date disc going with pie pan or domed dials.
C case will take flat... etc.

Left is domed, right is flat.

 

Thank you for the answers! I checked and it is domed what I have in under the dial. But it might have been replaced with a wrong one, that's why it isn't working apart from being badly scratched. I will try to find it basing on the ref number then.

 

Note that the date indicator being domed or flat is independent of the colour.

 

I think it is scratched because of a loose screw or something in there, not from wrong date disc.
And I think yours should be a domed, not flat.

 

Thanks to all for their opinion! My disc is domed, I changed it today and installed a part #560 1500, it fits and works well, so I believe the calendar discs may be widely interchangeable among the calibres of the same diameter.

 

There are no "600" series calendar disks...they are all from the 560 series.

 

Thank you, it's always good to acquire some new knowledge.