Advertising postcard from A. K. Zinn & Co., Battle Creek, Michigan, c. 1937 Caption on front : 25 lbs. calf meal Michigan State or Blatchfords .99; 100 lbs. stock salt .79; 100 lbs. peerless dairy 1.87. No cash necessary - we will accept orders against your milk check. A. K. ZINN & CO. 46 Liberty St., Battle Creek, Mich. Caption on back: Important. To take advantage of the specials shown on reverse side you must bring this card with you. Offer expires March 6. Sent to: Lee A. Graham, Credit Ass'n., % Marshall Prod., Marshall, Mich. Sent on: February 25, 1937.