any ideas on this item

any ideas on this item stamp says 35ctl. gowe silver 90 cheers stan
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“90” is often used on Continental (particularly French or German) electroplate. There may be a cluse to its nationality in the engraving on it. What does it say?

it says elbschloss

new pic of hallmark
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GOWE was a trademark of Wellner. Check here:
pewtertankardsflagons.com/in … te-marks-W