The Ithaca Gun Company first produced a single-barrel trap gun in 1914. Their guns were based on the Emil Flues three piece lock design and known as the Flues Single-Barrel Trap up until 1922 when it was replaced with a New Improved Design (NID) created by Frank Knickerbocker.
Flues Single-Barrel Trap (1914 - 1922) - This is a 1917 Ithaca Single Barrel Trap Gun - Early Flues Model Grade 4E with better grade of engravings - 12 Gauge - 32" Ventilated Rib Barrel with Excellent Bright Bore - Automatic Ejector - Factory Original Blue Finish and Color Case Hardened Receiver with Engravings in EXCELLENT Condition except for slight rub marks on left side of barrel near receiver area over chamber area - 14-3/4" LOP to Center of Pachmayr Recoil Pad - Checkered Walnut Stocks with Ebony Inlay In Forend Tip in EXCELLENT Condition - Blank Silver Shield Inlay in Buttstock - Serial# 2780xx - Tight Action.
Remington, Browning and Parker Shotguns are usually my favorite Shotguns, but I fell in love with this Ithaca 4E Flues antique Trap gun at first sight. I've read that Ithaca made a habit of producing guns for which Remington patents had expired. Ithaca really hit home runs with the Flues and Knickerbocker trap guns as far as I'm concerned!
Note: The Ithaca Flues Double was very popular at the time and accounted for the vast majority of the serial numbers represented in the table.