Hi Bob, I know this may not be good enough, but this is the only image I have from that particular 1951 PC755 "Cardinals Introduced" set. its an old image from my old site and I dont have this card anymore...
1951 "The Cardinals Introduce..."
St. Louis Cardinals Postcards
3625 Dodier St. address
(horizontal 3.5" by 5.5")
I have quite a few cards from the other PC755 sets, including 2 Hemus variations (cropping) from the 1954-55 "Dear Cardinal Fan" type
1954-55 "Dear Cardinal Fan"
St. Louis Cardinals Photos
(blank back, blue facsimile autograph)
(3.25" by 5.5")
1949-50
"Dear Friend" type
St. Louis Cardinals Postcards
Sportsman's Park address w/birds & bat
(horizontal 3.5" by 5.5")
1949-50
"Dear Cardinal Fan" type
St. Louis Cardinals Postcards
Sportsman's Park address w/birds & bat
(horizontal 3.5" by 5.5")
1951-52 "Dear Friend"
St. Louis Cardinals Postcards
Sportsman's Park address
(3.25" by 5.5")
1952-55 "Dear Friend"
St. Louis Cardinals Postcards
Busch Stadium address
(3.25" by 5.5")
1957 St. Louis Cardinals Postcards
(postcard back)