For Navy parts, the Navy Type Number book will sometimes help. You can get brief specs and sometimes the manufacturer's equivalent number. It will usually show the first equipment a component was used in. Capacitor 48487 was first used in the TAJ-5 transmitter. However 48101 is just listed as "General Use".
Meter 22291-D was used in the TBX-8.
http://www.navy-radio.com/manuals/nt-900109.htmCheers,
Nick