hi,open de case back,make better pics with movement,better pics with all case back to see what is write ,I think is stamped 18k,this is for gold.
open face pocket watch,can be 18k massive gold.You need to make better pics.Look on the button and that litle ring,see if is stamped.Sorry for my bad english.
how is stamped? can have gold stamped.But need to take care,in USA was many pocket watch gold plated.But this is antique watch,maybe is gold. Now,from your pics i can't see how to open it but i thinks is easy.Watch have 2 back cover,first is open.at some pocket watch is easy,with a litle knife.Put new pic with back because i don't wanna make mistake.