Circa 1990 American Derringer catalog which measures 8-1/2" x 11" with 4 pages.It has 8 models of Derringers and also features the Semmerling LM-4 in 9mm or .45 ACP and in matte blue or stainless finish(although fully featured with prices it was not available for some time).All guns are described with specs and Retail prices.There is no date or code but pricing dates it circa 1990. Excellent condition with creases where folded for mailing.