The green P25 is a rare colour, most are blue or black. Also in the UK the gold Insignia? P180 is unusual. My P180 is a stainless steel Flighter model which was much more common in the day. The nib is made so that you can write either way up to get 2 different line thicknesses. It seems to work, despite the strange appearance. Mine is M/F, but I recall other widths available as well.

An impressive set of pens.