I am very grateful for the great comments I have received so far. There is nothing unique about this stuff. It was same old stuff at Roseville in 1975. This was considered ho-hum back then:
Photos 1 and 2: SP SD45T-2 9168 on a reefer block at Center Street in Roseville, CA in 1975.
Photo 3: SP SD45T-2 9232 with three weekend warriors: SDP45s 3204, 3205 and 3203 in Roseville, CA in 1975.
Hope you are enjoying these old black and whites. As always your comments, corrections and/or other input and information are graciously appreciated.
~Steve Sloan