1959 Ruger Mark I Targert Model and Standard Model Instructions,5-3/8" x 8-3/8" with 6 fold-out pages.it is dated "Revised October 1,1952" above the guns on the cover and the code on the front cover lower left corner is "RP-10M-10/59" and the date on the price list is "Effective July 1,1950". Good condition with darkening of the paper,darker on the edges and some wrinkles