notice the 2 guns in the ledger above yours are no 2 sighted for 100,300 400 yours has a special notation it seems refering to the magazine plate being engraved ,,i believe that the engraving has more to do with it being a pair of guns than the model designation ,,i have the rigby ledger for my rifle around somewhere ,,do you have a better pic of the page,,,my gun was built in 1906 for a captain E.YORK.....paul