[Milsurplus] Identify unknown vibrator ?

[Hubert Miller]

Here are a couple shots of the innards. This thing does have a Signal Corps acceptance stamp on one side.
I thought it might be for a PE-237 - no luck. Wiring base is 6-pin tube like:
P1 NC to reed ( unenergized )
P2 gnd
P3 coil
P4 vibrator moving arm ( reed )
P5 Not used
P6 NO to reed ( unenergized )

thanks! - Hue Miller
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