[Milsurplus] Ident if possible

[Joseph Lutz]

Hi,

    Found a box of NOS circuit boards but unable to ident
from what equipment they are from.  Only identification
is the individual PC board label on the 'storage envelope':
i.e.,
401-23209-01   
A9 PITCH CODE DECISION
P/C ASSEMBLY
QTY: 1 EA
COMM. 3/76     

401-23214-01
A14 ANALYZER ANALOG
P/C ASSEMBLY
QTY: 1 EA
COMM.  ?/76

401-23212-01
A12 SPECTRUM ANALYZER
NO. 1 P/C ASSEMBLY
QTY:  1 EA
COMM. 3/76

[14 PC REPLACEMENT BOARDS TOTAL A1 TO A14]

Any ideas?
Thanks in advance.
Joe