Shown below is the cover of a typical booklet, this one for March 31, 1950. These were issued quarterly, and naturally describe all locomotives on the Pacific Lines part of the SP system (the summary shows system-wide totals for all Pacific Lines divisions). You can click on the image to enlarge it.
The cover of a typical booklet for March 31, 1950, describing all locomotives on the Pacific Lines part of the SP system. These booklets were issued quarterly. Click
The cover of a typical booklet for March 31, 1950, describing all locomotives on the Pacific Lines part of the SP system. These


The cover of a typical booklet for March 31, 1950, describing all locomotives on the Pacific Lines part of the SP system. These booklets were issued quarterly. Click on the image to enlarge it.

The cover of a typical booklet for March 31, 1950, describing all locomotives on the Pacific Lines part of the SP system. These booklets were issued quarterly. Click
 on the image to enlarge it.

The cover of a typical booklet for March 31, 1950, describing all locomotives on the Pacific Lines part of the SP system. These booklets were issued quarterly. Click on the image to enlarge it.

The cover of a typical booklet for March 31, 1950, describing all locomotives on the Pacific Lines part of the SP system. These