Help Identifying Greek Silversmith Mark

[bobandcindy]

I would appreciate any help identifying the Greek maker of this hammer sterling silver dish. I have a number of these but cannot identify the maker's mark after the omega. Thank you in advance for your help.

Bob

[ewakoci]

FOUND this:

https://www.eea.gr/arthra-eea/simansi-kosmimaton-kai-kodikoi-arithmoi-kata-nomo/

[AG2012]

Hi,
Omega (capital) delta (cursive) stands for Athens and number 56 was assigned to the maker (similar system in Italy with region abbreviation and registered number).
We managed to identify number 86 assigned to Georg Jensen designer Minas Spiridis who returned to Athens in 1980.Unfortunately,I cannot help with 56 maker.
Btw.very nice work depicting Vergina Sun.
Regards