Sure Power Inc, model 121T-1700-4.9-TTL-4 HeNe laser power supply.

Specifications:

Input: 12 VDC, 1.5 Amps.
Output:  1700 VDC,  4.9 mA
Start voltage:  >10KV
Dimensions:  5.1″ x 1.5″ x 1.2″ (130 x 38 x 30mm)

Features:

4 second Turn-on delay (defeat by cutting violet wire loop)
TTL turn-on (yellow wire to ground=ON)
Alden high voltage output connector.
RoHS compliant