Original vintage industrial magazine ad, for UNITED STATES RUBBER COMPANY.  This Sandwich Means More Vitamins for V-Belts.  U. S. Rainbow Multiple V-Belts with The Equa-Tensil Cord Section.   Old dated 1948 industry advertisement. 

On the reverse side (see Additional Images tab) are fractional page ads for AUBURN BUTTON WORKS, INC. of Auburn, NY.  Televisaphone 1950 Model Design by Product Technicians, Inc.  Is it a Job for Plastics?  DORIC MANUFACTURING COMPANY of Providence, RI.  Nuts Brass and Aluminum.  ARMSTRONG BROTHERS TOOL COMPANY of Chicago, IL.  Armstrong Drop Forged C Clamps.  Old industry advertisement.

Approximate size  8 x 11 inches.