German Lidded Beer Stein with DRM Marks

[lorenzmazzar0]

Hello All,

I purchased this german beer stein and wanted to know what the E.bay stamp on the underside is. I was told this was a german stein and with the DSM & DRM stamps in the lid I was sure it was.  Just want to make sure what the E.bay stands for.

Three pictures attached. 

Any help is appreciated.

Thanks

Lorenzo

[md1919]

bay is the name of the company who made it. they were in business from 1933-1971