I have been fortunate enough to pick up a WR in 375 Rimless Magnum.
It is in excellent shape and the barrels are as new.
Even the breech face does not show any practical use.
The gun was built for Mario Pasquel, son of a Mexican shipping magnate, and brother of Jorge Pasquel, the Mexican baseball league owner.
It was finished in 1950.
Here are a few pictures...

The gun has a neatly embedded ghost ring on the C-bolt, and no standing rear sight.

Proof marks

Breech face

Locks

Stock

The gun has all the goodies: flip up hood front sight, moon sight, grip cap trap, ejectors, chopper lump barrels, gold escutcheon (vacant), case, etc...

Note: The barrels are signed "JB". Would anyone have a full name?

Best regards,
WC