Mystery solved? Yowsa!
The poster on MT's twitter tweeted:
SF_Historian
@SF_Historian
ยท
Apr 16
In 1936, Mabel Grady leased the rooftop of her building for construction of a new "motion picture billboard." Less than a year later, however, Grady sold the building to Sanford Jacobi, who demolished the building for a new Sontag drugstore.
L.A. Citizen, September 5, 1936
Hmm...a San Francisco historian found the answer!
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Thanks for finding this
Handsome Stranger!
That mystery was a long time solving!!!