The CV2692 is a gas-filled photocell that has a high sensitivity to the red end of the spectrum.

The photocathode and rod anode.

Thanks to Bob Hopkins for sending the images.

The wide glass tube envelope is 27 mm in diameter, and excluding the UX4 base pins is 88 mm tall.

Reference: Datasheet. Type CV2692 was first introduced^¶ in 1945.

 
Pin Connections

UX4	1	2	3	4
	-	a	-	k

 
Absolute Maximum Operating Conditions^¶

Photocell	Va
	100

Thanks to Frank Philipse for supplying the above PDF datasheet