Andy wrote:
The TSO number is written on that sheet (among other things).

Are you saying you have looked at TS 10.220/48 and that it specifies
compliance with ETSO-C10b?

No. I'm saying that I have seen such "Kennblätter" of other instruments
before and I'm just explaining the meaning of the number TS 10.220/48.

I've already suggested in an earlier post that you ask directly Winter.
They have an email address.