2N393 PNP Germanium transistor - Sprague

Very rare 2N393 PNP Germanium transistor in a TO-24 metal test tube. Made by Sprague.

Awaiting datasheet.  

Status: NOS (New Old Stock)  circa 1960's

NSN: 5961-00-778-3814  indicates these were used in the Polaris Nuclear ICBM (Inter Continental Balistic Missile), 

not so re-assuring postscript : The Polaris upgrade probably now uses all surface mount components, "allegedly"  leftovers from the Xbox 360 parts bins  (*).    ..... Blue ring of death anybody ?

NB: (*)  This is a joke,  everyone knows the parts come from the later Xbox One as the missiles have to have the capability to self power up if someone shouts "on" , just don't shout "fire"

Update 23-1-2017 ...... Polaris missile fails test launch and heads towards to USA, Oooops.... that's an own goal !