From the introduction of the Remington Repeating Shotgun, the No. 3 was the "Trap" Grade. Shown here in in the 1908-9 Remington Arms Co. catalog --
Remington Repeating Shotgun 1908-09.jpg
and a 1910 pocket catalog --
Model 1908 from 1910 pocket catalogue.jpg
In 1911, Marcellus Hartley Dodge combined his arms and ammunition companies as Remington Arms - Union Metallic Cartridge Co. In the 1911-12 Rem-UMC catalog they began calling this John D. Pedersen designed gun the Model No. 10, but they kept numbers 1 to 6 for the grades. By the 1913-14 Rem-UMC catalog they began using letters A to F for the grades --
No. 10C Trap Grade 1913-14 catalog.jpeg
and added a second gun for trap shooting the Model No. 10S "Trap Special" Grade --
No. 10S Trap Special Grade 1913-14 catalog.jpg
During 1916 they incorporated and became The Remington Arms Union Metallic Cartridge Co., Inc. Through their last catalog in 1920, the pump trap gun offerings remained the No. 10C and No. 10S --
No. 10, 1920 The Remington Arms Union Metallic Cartridge Co., Inc. catalog.jpeg
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