Just ran across this set and I remembered your WTB request. You'll need a compressed air/24 VDC supply. Came off an M35 Deuce 6 X 6:
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Manufacturer Part Number: 7526286 Country/Region of Manufacture: United States
Interchange Part Number: MS51301-1 Brand: Military
Other Part Number: 2590-00-900-1640 Country of Manufacture: United States
Warranty: No
This sale is for a Sparton Air Horn, that came off a M35 Deuce 6x6.
Horn I tested with air, and 24 volt's to the solenoid switch.
Assembly works Great!
Boots will need to be replaced, or leave them as it stands... packard plugs cover studs well.
Studs are tight none burnt or messed up.
The proper harness wires from the truck are with this one id tags are number on wires are # 25.
The paint on this looks pretty good, paint chip, some minor scratches on it, all in all pretty decent shape for what it is and especially what it was off of.
I also included the fitting, piece of the copper line from the truck this was off of.
From horn opening to end comes to about 12". Width is about 6.50".
http://www.ebay.com/itm/Army-Deuce-..._Accessories&hash=item2a44eb9658#ht_443wt_916
Current high bid is only $20 with less than 20 hours remaining.