Topic: Plates with perforated rim

[Anne E.B.]

Anyone know what these are please?  I did have a link to a great Gullaskruf site which had similar type plates, but I've been unable to find it again.  They're not Rudolfova Hut's "Perforal" as I checked on Marcus' website.
TIA

[Anne E.B.]

First image has incorrect label.

[Ivo]

I'm 404 on the maker but here these are known as ribbon plates. We see a lot of these around here, often made by Walther/ Nachtman and suchlike.

[Anne E.B.]

Thank you Ivo