Flues Model trap gun was introduced in 1914. Offered in Grades 4, 5, 6 and 7. Lower cost Victory grade introduced in 1919. Highest cost variety Sousa Special introduced in 1918. All Flues model trap guns were made within same serial number sequence as double guns, but do have letter "T" for Trap following serial number. All Flues Models, with exception of Victory Grade, were produced with an automatic ejector. Rubber anti-recoil pad was an option. Guns having a pre-1916 engraving pattern will command highest prices.