It looks like silver-plate, thanks Gwyn.

Will do, thanks.

thanks, couldn't find it anywhere!

possible, thanks Janea.

Thanks, Cham.

Possible, but the stamped letters are not cyrillic.

Icy - the closest I came was - WH9 - couldn't read the O.

 

This is the closest :

 

images - 2021-11-21T154014.985.jpeg

 

Try Wang Hing - Hong Kong.

 

 

Excellent, thanks Dom! Will follow that up.