Rock Island Auction Company

Lot 494: Westinghouse Mark 2/4 20mm Oerlikon Cannon, Class III/NFA DEWAT

Auction Date: September 10, 2021

Scarce Westinghouse Mark 2/4 20mm Oerlikon Cannon, Class III/NFA DEWAT

Price Realized:
Estimated Price: $6,500 - $11,000

Scarce Westinghouse Mark 2/4 20mm Oerlikon Cannon, Class III/NFA DEWAT

Manufacturer: Westinghouse
Model: MK2/4
Type: Destructive Device
Gauge: 20 mm (Cannon)
Barrel: 57 1/2 inch round
Finish: parkerized
Item Views: 2787
Item Interest: Active
Serial Number:
Catalog Page: 342
Class: Class III

First entering development in Germany towards the end of World War I and relocated to Switzerland due to the terms of the Versailles Treaty, the Oerlikon Cannon would pass through several phases of refinement in order to become one of the signature emplacement/vehicle weapons of World War II. Adopted by multiple nations and used in a variety of roles, including naval point defense, aircraft cannon and land vehicle armament, the Oerlikon still remains in active use with a number of armed forces. As originally made in Switzerland, the Oerlikon was potent, but not suitable for mass production, generally being individually assembled with filed-to-fit components, requiring American manufacturers to adjust the design to permit the volume needed for the War. This example was manufactured by Westinghouse, and later in life subjected to torch cutting and registration with the BATFE as a Deactivated War Trophy (DEWAT), with a prominent torch cut running about halfway through the top of the receiver just ahead of (and partially through) the makers marks and into the breech assembly, and a smoothbore "dummy" barrel installed. A three-legged display mount (no traverse or elevation mechanism) has been fitted to the underside.

Rating Definition:

Very good as deactivated. The barrel and tripod show about 70% black finish, both showing areas of flaking and oxidization, the barrel showing areas of heavier rust, the latter showing rough cutting at the bases. The receiver and breech assembly retain about 60% of the parkerization, with areas of brown patina, scattered spotting, and handling marks. Some components, including the drum magazine, are absent. No guarantees regarding the ease, expense, or safety of reactivating this firearm are given. NOTE: This weapon is a National Firearms Act (NFA), Class 3 DEWAT that is fully transferable, which is registered with the Bureau of Alcohol, Tobacco, Firearms and Explosives, (BATFE) under the provisions of 18 U.S.C. Chapter 44 and 27 CFR part 478.

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