Dear Don, Ron Smith is right on with his comments. I am fortunate to own two 1914 4" barrel Erfurts. They are supposed to be the scarcest of the WW1 production Lugers, save for the 1910 Erfurt and 1914 DWM Artillery. To be a "true" 4" barrel Erfurt, it must have an unrelieved sear bar, have no notch over the chamber for the Artillery rear sight, and two acceptance marks on the bottom of the wooden magazine (later Erfurts, 1913 onwards have only one). And, of course, the serial number range goes only into the "b" suffix range, as only 7 thousand are reported (Still says the known serial range is 504-9448b..page 15 of Imperial Lugers). A number of putative "1914" Erfurts have appeared over the last few years with later suffix numbers (up to "q"), a notch over the chamber, relieved sear bars, and only one acceptance mark on the magazine. It is my feeling that these are either "reworks" or later factory releases using left over 1914 receivers. I can see no other explanations for them. Please let us know further information on your 1914. Maybe you can post pictures.