I agree, but there
is a hint that the postcard is pre-1912.
If L.A.C. does, in fact, stand for the Los Angeles Athletic Club. (which was located across the street from 215 Spring until 1912)
In 1912, the athletic club moved into its new headquarters at 431 W. 7th St.
But perhaps L.A.C. stands for something
other than the Los Angeles Athletic Club (the initials used for the club is usually L.A.A.C.)
As a reminder...here is the postcard, again.
ASKING $39.99 on
eBay
The guy kneeling looks somewhat familiar. Maybe he was in the movies.
.