Some Parker ‘Flighters’ - Jotter, Vector, 45, 25, Frontier, Urban

L-R:
2004 Parker Jotter made in UK:

2019 Parker Vector made in India by Luxor;
1970s Parker 45 made in England;
1979 Parker 25 made in England 2015;
Parker Frontier made in India by Luxor;
2015 Parker Urban made in France.

The converter that is above all the pens in the photo is of the type that came with the original 45 - and you need to know that it will fit in to ONLY the 45!
It is too girthy/‘fat’ to fit in to any of these other pens, or any Parker pens that were designed after 1980.