[Milsurplus] ID'ing a handset & headphones

[Barry]

are these a matched pair?  what were they used w/?  are they complete?
microphone: signal corps marked, "Microphone T-17-B
                                  |375| - PHILA - 43"
also marked: SHURE SW-109; there is a tag on the cord itself, but it is
difficult to read: contains "Signal Corps", "Shure Brothers", "USA", &
some other i can't make out.
headset: backside of each earpiece is marked: "U.S. Navy
                                               ANB-H-1A
                                                 C.T.E."

both cords fairly supple; a cleaning w/ windex helped the looks somewhat
(AFTER the pix were taken, of course!).
BC-375 mic?
pix @:
http://home.att.net/~btuttleman1/milhedphon.jpg
http://home.att.net/~btuttleman1/milmic.jpg
items are will be for sale.
tnx,
barry
carson city, nv