Bomb gauge ID

[Guest Entropy]

Can someone help me identify the airframe(s) this gauge was used in? I did a search for the model #  and it pulls up a number of different amp and volt gauges but nothing ordinance related. Thanks

[Guest Entropy]

For what it’s worth, this is the only other marking I can find on the gauge.

[phantomfixer]

part of a test stand/box to test or calibrate an intervalometer?

[Vark_07]

B-2A, AN-B3 and B-3C are intervalometers I've the most easily found. They do not sport such gauge though.

From the cockpit views I've seen so far, the bomb control panels, wether they were fitted on WW2 bombers up to 80's-era jets, featured only setting wheels and / or switches.

I'd concur with Phantomfixer, this looks like a test-bench or calibration (hence the CAL. ?) instrument.