Der Ami, You are correct that the Triple Lock (Correct name New Century or .44 Hand Ejector 1st Model) didn't start production until 1907, and was discontinued in 1915. It was replaced by the .44 HE, 2nd Model in 1915, without the 3rd lock and without the ejector shroud. The .44 3rd Model was introduced in 1926 with the ejector shroud, but without the 3rd lock, and both 2nd and 3rd models were produced until WWII.