Hi.
I need to replace a data disc of a Polerouter with 215-1 movement, because it doesn't advance at day 26.
I found on ebay such a data disc, but for 215-2 and the seller doesn't know if it is compatible with 215-1.
Does any of you experts know if they are interchangeable?
Thanks a lot.

 

I'm not an expert, but based on the following from cousinsuk, the date discs of the two movements rotate in opposite directions to begin with.

 

Thanks a lot. That's it. I remembered there was interchangeability but it is between 215-2 and 218-2 (apart from some minor pieces).