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The third valve Moorhead Laboratories produced for WWI was named by the US Navy SE 1444. This valve was designed by the Navy Bureau of Steam Engineering shortened to SE and then given the number 1444. This numbering system was devised by George Clark. It was the only Navy valve that could be used for both receiving and transmitting, testament to a great Moorhead manufacturing process.

The SE1444 is identical to the Moorhead VT-A.

The original Box.

Thanks to Joe Gruber for sending the images.

The balloon envelope is 44 mm in diameter and, excluding the UV base pins, is 104 mm tall.

Reference: Joe Gruber. Type SE1444 was first introduced in 1917. See also 1917 adverts.

Pin Connections