Sorry to have to muddy the waters a bit more but a number of years ago I owned a C&H 12 BLE that was sideplated and of very high quality. Very similar to the gun illustrated on Safari Outfitters website except it was a game gun with 30" damascus barrels,
spectacular wood and had original nitro proof marks from the 1896-1904 era.It definitely had Extra Quality Victor Grade engraved on the top rib.I have since assumed this term was used for their best quality guns whether SL or BL.Perhaps a phone call to Niles at Safari would help to confirm.
Terry

Better to keep your mouth shut and be thought stupid,than open it and confirm.