I recently discovered a Colibri fountain pen in my drawer. Can't recall how I came by it. It has "Colibri R.O.C." stamped on the gold colored band on the bottom of the cap. My problem is that the cap does not snap closed. I don't know if something has come off of the pen body or out of the cap. The cap just falls off. I would like to try to use it for sketching, since it as a very fine nib, but I dare not put in a cartridge for fear of it drying out. 1. Any ideas how it can be fixed? Is this pen worth enough to bother getting it fixed? 2. Anybody know anything about the model Colibri? Thanks.