The hallmarks on these tongs are from Germany after 1888. The 800 is the silver purity, the crescent moon and crown are the national mark for Germany. As there is no makers mark, I haven't been able to work out who made them, but they were probably made in the 1930's.
From these tongs, I managed to dig around the family home and find another piece, which was an English Sterling bookmark that belonged to my great-grandfather! These two were the beginning of what I'm sure will be a lifetime of collecting!