3.25x4.25" cardboard mailer plus 11 thin card stock glossy photos, (12 were issued in the set). Mailer is unaddressed but has return address area marked "Greetings From Hopalong Cassidy." Return address below "Bol. Mfg. Co. Chicago, Illinois." Back of mailer has photo of Hoppy w/text including "Howdy Partner/I Hope That You Will Enjoy My Set Of Autographed Pictures. And I Also Hope That You And Your Family Will Continue To Enjoy My Delicious, Cooling, Thirst-Quenching Drink/Hopalong-Aid/Cassidy/Just Remember-You Get 10 Big Glasses Of This Wonderful Drink For Just 5¢." Text continues w/flavors and ads "And I'll Be Glad To Send You More Of My Pictures If You Will Send In The Envelopes Of Three Packages Of Hopalong Cassidy-Aid And Just 10¢ In Coin Or Stamps.." 3x4" photos each have inscription and read "Good Luck From Hoppy." Backs are blank. 1950s. Issued as a set of 12,this lot is missing just 1. Mailer has lt. tanning from age and 1.5" diagonal tear on flap across wording of "Hopalong-Aid." Fine. Photos are N. Mint/Mint as issued. The only other time in our 42 years we have offered this items was in Auction #190, Jan. 2007. That was a full set of 12 w/mailer and it sold for $853.00.