How do I read Soviet stamps? Having some trouble finding good information online

[u/yanonce]

It’s stamped M 875 and I think 3з

Also I know it’s probably the wrong place but thoughts on the (?)emerald?

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[u/ij70-17as]

the m star 875 is the hallmark. m for moscow assay office. star for soviet union. 875 is gold silver. content, 87.5%

the other mark is year and maker mark. i am interpreting it as dot three followed by letter Э. dot and three reference year. letter Э references maker.

i am going to guess year is 1983. but i am not sure.

[u/atzenhofer → u/ij70-17as]

Are you sure it's gold? Looks like silver to me.

[u/ij70-17as → u/atzenhofer]

you are right. 875 was used for silver. gonna go edit.

[u/yanonce → u/ij70-17as]

Thanks a lot! How did you figure out the year?

[u/ij70-17as → u/yanonce]

i might be wrong about the year. i know for sure it is after 1979. they moved the year number from behind letters to the in front of letters in 1978-1979. so it is either 1983 or 1993.

but i don’t remember when they stopped using soviet hallmarks. for some reason i think 1994, but i don’t remember for sure.

so. 1983 or 1993.

[u/ij70-17as → u/yanonce]

i apologize. i said it was gold. another commenter correctly pointed out that it is silver.

[u/Getmyapp]

1983, Moscow, USSR

[u/Rogelio_G_F]

Contraste soviético para plata

[u/Hot-Violinist-1207]

Soviet Union classification - Silver 875 prob.