Please help ID this fish platter

Hello all - need help identifying this fish platter. The platter measures 22" long and 10" wide, and weighs 3 lbs 5 oz. It has those number marks on the back but I have no idea what they represent. As always any input is much appreciated and let me know if more info is needed. Thank you.

 

Thanks, definitely the same pattern.

 

Replacements has it listed as made by Marx and Gutherz.
I must have found six or more of these fish platters on the internet and all of them have the seashell and seaweed design in the center positioned exactly the opposite of yours.


https://www.replacements.com/china-marx-and-gutherz-2097-95/c/268778

History of Marx and Gutherz article:
https://www.worthpoint.com/dictionary/p/ceramics/austria/gutherz-royal-austria

 

Thanks for the info!