Mystery mark on old plate. Pls join for discussion

Hello community!!

I’d really appreciate your help. I’ve recently acquired this plate.
It measures 25.5 cm in diameter. On the reverse there are clear traces from a drying/stacking stand — three separate marks, and within each mark there are three contact points where the plate touched the stand. The plate is marked, but after spending hours going through my European and British reference catalogues, I still haven’t been able to identify the mark.

In my view it could date to before 1850, with quite a wide range — possibly even 18th century. It could potentially be Japanese as well. At this stage, anything is possible.

What I’m hoping is that someone here may recognise either the pattern or the marking, or at least point me in the right direction for further research. Shall we solve this mystery together?

 

I can't really add anything yet though I did look a little into French marks as it strikes me as a possibility, without finding much.

It did occur to me that if you fill in the little area that might be missing from the mark and rotate it, it rather looks like a "2". Just an observation.

 

Thank you, that’s a good point. Just had a look through catalogues one more time. Of course no specific maker with “2” mark. But it could be painters number. Whole plate looks French to me too.