Aircraft instruments found recently

what from?

They are all from the same manufacturer -
Electronics Associates, Inc, of New Jersey.
One instrument has an apparent date of 1966, the others have no date,
only model/serial no. information

I also have a gyro that came in the same lot and an additional altimeter
(both altimeters shown above - why are they different lengths...).

All the instruments' cabling ends in pcb board connectors as shown by the green block to the left
of the fuel flow meter.
Are they of any use?
 

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