French Maker’s Hallmark for Parker Pens on nib of Parker 75

This mark - ‘PP’ separated by an upward-pointing arrow - is the hallmark for ‘Parker Pens’.
It is on the 14k gold nib on my Parker 75 that was made at Parker’s factory in Méru, France, in 1984 Q1.
 

The fact that it is enclosed within a losange shows, according to French law, that it is a ‘responsibility mark’ for a manufacturer.

A ‘responsibility mark’ for an importer of an item would, according to French law, be enclosed within an oval.

(See e.g. my photo of the ‘PF’ mark on the nib of my ‘W.-Germany’ Pelikan M800.)

For an explanation of the relevant French law concerning Customs/Assay hallmarks, see:

https://www.douane.gouv.fr/fiche/regles-de-marque-pour-la-garantie-des-metaux-precieux