Originally Posted by ellenbr
Are you quite certain that the KKs aren't two RRs from Römerwerke?

Not just "quite", but with 150 % certainty.
Absolutely.

With Antiqua-based print fonts, it is different. A lightly struck capital K, notably on a curved surface, can easily appear an R. I have a Drilling which posed exactly this quandary.

However, with this Sütterlin based capital font, any doubt is impossible. Cannot even remotely resemble any "R".
Google Sütterlin K or Sütterlin Großbuchstabe K, you will see the vast difference.

Regards, Carcano