This Circa-1957 brochure measures 3-1/2" x 6" with 8 fold-out pages/panels.It features the 4X Pioneer,4X Mountaineer and 2-1/2X Pioneer scopes.The scopes are pictured with descriptions,reticle choice and specs.There is also the Leupold Adjusto Mount.The code on the back cover is "156-35". Excellent As-New condition