[Milsurplus] Transformer id

[Glenn Little WB4UIV]

I have, what looks like, an IF transformer.
It has 6 terminals on the base arranged in a circle.
The tuning is via two trimmer \capacitors, C32-3A and C32-3B.
These are covered by a dust cover that rotates to allow tuning then 
rotates back to cover the openings.
On this cover is marked "181" and the capacitor designations.
The transformer aluminum housing is 3-3/8" high x 1-3/8" wide x 1-3/4" deep.

Any ideas as to what this is from?
It appears to be shop worn  NOS.
Anyone need it for the postage?

73
Glenn
WB4UIV
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Glenn Little                ARRL Technical Specialist   QCWA  LM 28417
Amateur Callsign:  WB4UIV            wb4uiv at arrl.net    AMSAT LM 2178
QTH:  Goose Creek, SC USA (EM92xx)  USSVI LM   NRA LM   SBE ARRL TAPR
"It is not the class of license that the Amateur holds but the class
of the Amateur that holds the license"
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