[Milsurplus] ID'ing: ID-292/PRC-6 box

[Barry]

picked up the following yesterday, appears unissued (or unused!):

ID-292/PRC-6; Indicator, Channel Alignment; Raytheon manufacture
also included was a further component: in the original military tube
carton: 5960-230-5262, Electron Tube, Jan 5678, 1 each, Mthd III.
component inside is a Tung-Sol piece.  is this unit a spare for the
indicator unit?
meter, case (inside and out) immaculate, connecting cable likewise.

any further info on the unit?  consider offers.
tnx to the group,
barry
carson city, nv