By all means BUY (?) MILK
“By all means BUY… MILK” at top, “SUPPLEE WILLS-JONES” at bottom.
Here is the location in a photo dated 8/1/1955…
… and the sign is not visible. Painted over?
Tagline could be “By all means buy Gold Medal Milk” as in this photo of a Supplee-Wills-Jones billboard (far right just in front of the car) taken in an unkown area of Philadelphia in 1923… the lettering styles do match up:
A large local dairy and ice cream manufacturer, Supplee-Wills-Jones carried their own brand(s) as well as distributed Sealtest. In 1950 the company was 145 years old – unsure when or if the company was bought or closed.
5th and Fairmount [map]