Cheri, had no time today to count the rays of the star base - in fact I even didn't go to my museum :? but looked through all catalogues' copies I have got:
there is a similar oval tray with the
same star base in the Walther VMG 1931 catalogue ROLAND # 21186/21188 on page 46 - the one pictured has got 18 arches, whereas yours has 30 ! maybe 21186 had 18 and 21188 had 30? :evil:
another one is shown on page 114 - that one has got 24 arches :?
I do think that offering your tray as maybe Walther is not incorrect, but it seems - as Glen said - it is not MARY
'Mary' as a pattern name never apppeared again in Walther catalogues in other shapes!
Glen, are you able to post the Walther/Radeberg pages here, please? VMG 1931 came with PK 2003-2-1 : thank you! (this computer here is a simple small notebook, no scan, no print, no nothing but GMB! which is the most valuable equipment

)