NOT MINE!! Seen on FB, these may be available.
The Black one is for auto temp, came out in '68 with the introduction of the auto temp system.
The Blue one was for auto temp ll, not sure about the exact date but I think it was 1974.
These were usually mounted on a roll away console with some other test equipment. Both were pretty much useless for finding the large number of small vacuum leaks that plagued both systems.
Dave