Here is a historic blue print diagram SHOWING THE BRAKE SHOE RACK FOR MOTOR COACH GARAGE.
Key System was a Railroad Railway and Bus system for the East Bay of Albany, Berkeley, Oakland, etc.

This was part of the Harre & Ralph Demorro Collection I bought many years ago.

I would guess this to be around the 1940's.

Approx dimensions, are 17 by 21

Condition is fairly good see noted conditions above, if any.

$7.50 packaged and shipped U S mail anywhere in the U.S with insurance included, . Combine shipping always

I will ship out of country at cost of international shipping.