Thanks a lot Bill !
Bill, could you please share the RFF link here? I cannot locate it so far ! Thanks. Best, Jean-Marc.
apparently there are not repairable anymore, check this, updated in 2014:
The Ricoh GR....A buyers guide - Japan Camera Hunter
I have a 2 inch NOC f2 lens as well, sn 354210 and a 105 Trinol 3.5 sn 34696 .
Would also like to find more infos about these lenses !...
Separate names with a comma.