Mark, your gun could perfectly be a 7RE/P, a grading that was used in 1921,
the E being Ejector. The R usually designated Cannon Rayé or Rifled barrel
(the right one and used for dispersion of the shot) but yours doesn't seem to
have such option.
The book's ISBN is 978-2-9128-4875-8
It is in french and mine was bought in France by a friend.
Amazon France has it.
Here they also have it with the rest of M. Mournetas' books.
I also discovered that on 31-May-2011 at 19:49:01 in Paris, a copy of a 1921 Manufrance Catalogue was sold for Eur71.-
I sent a message to Corinne, the seller, to see if she can give me the contact of the buyer who in turn, looking at
your Idéal's photos and his catalogue, could be able to identify its grade. Hopefully I'll get a reply.
Don't you love the times we live in!
JC
