Cars without doors were called "gate cars" after the pantograph gates used to close off the steps. These cars were seldom used on the higher speed #40 line.
Details
Local Identifier
AAX-0045
Title
[Fifth at Market street looking north at "gate car" 930 on San Mateo Suburban #40 line]
All requests for permission to publish from photographs must be submitted in writing to the Photo Curator. Permission for publication is given on behalf of the San Francisco Public Library as the owner of the physical items.