Topic: I really need help on this one. Opaque olive green plate with orange "paint"

[Marcel1597]

I've had this item for about 25 years now. From time to time I go online and do a search. Can't find it, or anything similar.
It was found in a thrift shop in the Netherlands and I have absolutely no idea what is is.
I'm a bit lost when in comes to glass that not dutch or hugely common I'm afraid.
It's 32 cm in diameter, weighs 487 grams ans stands 5 cm high.
The orange piment seems to be on top of the surface at places
There is a raised line just off center on the back over the full width
Just above the line near the rim there is an indentation that looks like a "2 "

I will appreciate any feedback you can give me

Regards,

Marcel