Recover silver from Boards

[piper]

Have several boards with lots of solder that appear to have silver within the solder, ( both boards heavly coated from mid to early 70") Wondering what might be some methods to recover the silver, these have chip sockets for IC"S and seveal Pins for wire wraping, I say some referecne to using copper sulfate. Is it worth the time an effort ?

THanks
Piper 21N658

 

[jimdoc]

You have to test it first to make sure it is silver.

Jim

 

[Lino1406]

Most solders contain about 3% silver. So, if it
was 340 instead of 34..