Details
New old stock 7 pin miniature 85 volt voltage reference. 85A2 is the European type number. CV449 is the British military common valve number. Various brands.
NSN/FSN = 5960005050273, 5960008930439, 5960000720577, 5960006791768, 5960000534398, 5960005815534, 5960008366273, 5960005717062, 5960009127630, 5960000238921, 5960007799163
HP/Agilent Number = 1940-0010
Tektronix Number = 154-0291-00