I believe it is an aircraft gauge, as “A S U.S. Army” should stand for “Air Service U.S. Army”. Also, it has the Pioneer Instrument Company “PI” logo at the top of two of the gauges, although it’s possible they made gauges also for tanks. The Army Air Service did experiment with vertical gauges in the early ’20s though, which seems to match some of the numbers at the bottom of the gauge.

It may have come from an early Curtiss Hawk biplane or early Boeing fighter.

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