Need help identifying a silver, bastnig spoon

Hi, greetings from Poland,

I have a large spoon, probable made from silver 0,750 in Germany, Flensburg town. The maker name? is unreadable. I’ve enclosed a few photos, also one negative to make marks seen more precisely.

Can anyone please identify the maker and/or age of the attached photos. I know that identifying this spoon will be very hard as too little data is given. A spoon is really very huge, about 36cm/14.17 inches long, and weight 204 gram/6,5 troy oz.

Please see attachment. Thanks for any help.

Tom
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Another two photos…
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