No one, including Charles Semmer who wrote the book Remington Double Shotguns, has decoded all the various markings found on the bottoms of the barrel tubes of Remington doubles.
Charles shows a bunch of different markings in his book, and these are the markings on my Remington Hammerless Doubles --
1906 12-gauge KE-Grade has /// K E Y
1907 12-gauge KE-Grade has L K E Y
1909 16-gauge KE-Grade has X K E A1
1896 12-gauge AE-Grade has P A
1906 12-gauge FE Trap has /// F E G 13
1894 12-gauge BE-Grade has B J and a poorly struck E or an F
1907 CEO-Grade 12-gauge has /// M
1905 DEO-Grade 16-gauge has X O
In some cases you can get the grade as in the KE and FE. My BE-Grade has Chain Damascus barrels, and on the Remington Damascus salesman sample the Chain Damascus is labeled CHAIN J. So, B for the grade, J for the barrel material and E for ejectors?!? Hmmm....
