Hi Please help with mark on sterling ? cigarette holder

[bozena1234]

Hi
Please help with mark on sterling ? cigarette holder
Thank you in advance 

[jrkirk]

Why do you think it is sterling? You do not picture a sterling mark, as far as I can see.

[bozena1234]

Photos #4 and #5 with marks inside

[drov8833]

I'm guessing Japanese but probably wrong. Good luck

[fidbald]

looks Chinese too me. the right mark looks like a house upside down. probably for export.

I doubt it's sterling. the Germans even used the term Chinasilber for certain alloys like Packfong, Alpacca etc..

https://www.925-1000.com/chinex_04.html#M