1982 Ruger 20 Gauge O/U Shotgun Instructions which measures 5-1/2" x 8-1/2" with 15 numbered pages.There are 2 pages discussing the characteristics of the shotgun with an illustration of a cut-a-way receiver.That is followed by assembly instructions,takedown procedure,shotgun operation,care and cleaning.There is an exploded view with a parts price list.the code on the front cover is "OU1-1-82 R3". Excellent condition