Hello, I am new to the forum and I am looking for some information on a gun I just purchased. It is marked Lefever Arms Co and has fluid steel barrels that have been cut down to 26". It is marked 317xx I. It is also marked "Pat'd 1872" under the forearm. From information I have so far, the serial number puts it at 1901 but I am aware that 1/3 of the guns made by LAC were produced out of sequence and even some of them were finished in Ithaca after the sale in 1916. Furthermore, "I" grades did not begin until serial numbers around 360xx according to some experts that I have consulted. This gun does have a dolls head rib extension to perhaps complicate things more. Any help from you double gun enthusiasts out there?