Hello Geno,

After perusing the 1910 Manufrance Catalogue I tend to agree with you.

The grade 6RE/E appears on page 79 and is called an "Idal EXCELSIOR".
Description mentions the engraving is special to each gun.

This is added to the description of the model 6RE:

"All parts of the weapon have been carefully checked, and it is only after establishing that the gun is perfection itself that the Directors themselves apply, on the action and the barrels, their special MDF proof mark, certifying that this weapon is a true masterpiece of gun making."

Mark, you did find a special one indeed!

JC

"...it is always advisable to perceive clearly our ignorance." Charles Darwin