Japanese Pens

Picked up a couple of nice Japanese pens recently - three Platinum pens from the 1970's, and one Pilot pen from the 1950's.

I am particularly interested in the Pilot, which is a lever-filler with a flexible steel nib. My Sailor eyedropper has a flexible steel 'Shiro' nib, which is quite wonderful, so I am hoping the Pilot nib will be similar.