These are spiffy finder rings from Edmunds in grey-green. The screws have nice nylon caps so as to not mar the paint on your finder. The inside diameter is a little less than 2". (I'm not up on my metric conversions this late at night). Nice cast metal, a little rust on the screws but they all move easy.
You know, they look a little like Gidney and Cloyd--the Rocky and Bullwinkle moonmen!
First $25 takes it; $3 shipping in the US. Paypal, check, money order. Will ship worldwide-inquire.