Please help identify German maker's mark on a cigar box

[Gerox]

Hello All,
There is a nice German cigar box, punched crescent crown and 800 silver.

Can someone identify the manufacturer?

Has anybody an idea?
Any help would be greatly appreciated. Thank you!
Gerox

[Bahner]

Hello, have seen this mark on flatware and holloware in combination with the marks of major German silver manufacturers (Wilkens, Koch and Bergfeld etc), so I suspect this to be a retailer`s mark rather than a maker's mark. Regards, Bahner