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The VR92 is a miniature signal diode equivalent to the commercial EA50. The VR designation indicates a pre WWII RAF service code.

This diode was originally developed for television signal demodulation.

The tiny anode is almost flat with a central cylindrical space for the cathode.

The thin glass tube envelope is 11 mm in diameter and, excluding the B3G base pins, is 40 mm tall.

References: Datasheet & ¹⁰⁴⁰. Type VR92 was first introduced in 1939.

Thanks to Frank Philipse for supplying the above PDF datasheet.