Platinum PMP with 22k nib (F)

In the 1970s, the three Japanese brands had a huge pocket pen catalog. Someone started pushing the idea that higher karat meant more prestige, and a karat war broke out, with Pilot and Platinum nibs going as high as 22k, and Sailor as high as 23k, before the nonsense died out. (I've heard of 23.99k Sailor nibs but I've never seen one.)

The higher karat nibs are usually found in pocket pens. This pen houses the only high-karat nib I've ever found in a full-sized pen. This is a stiff nib, but has a nice bounce. One of my favorite Japanese vintage nibs.

This nib is delicate and is NOT a flex nib. Please don't try to flex it.