Registration widely misquoted as XB-DUZ.

All that remains of the 17 of these built is the fuselage of this machine.

the aircraft entered service with the US Navy in October 1944 as 39307. the type was designated as C-93. To National Skyway Freight/Flying Tiger Line in July 1945 as NC33308. Not taken up by Aerovias Q as CU-C-495. To an unknown owner around 1948 as XB-QUZ (widely misquoted as XB-DUZ). Seized in the mid-1960's for smuggling at Douglas-Bisbee (KDUG). It was placed in open storage at Douglas for a long time before being sold at an auction. The buyer donated the frame to the museum. In March 2020 it was photographed in pieces in the restoration area.

The sole surviving RB-1 Conestoga twin-engined cargo transport. Built in 1944 for US Navy. Three prototypes and 17 production aircraft - this one as serial Bu39307. With increased US production of aluminium, the use of heavier stainless steel in aircraft became unnecessary and further large orders for the type by the USN and USAAF were cancelled. Flew as XB-QUZ postwar, but many source incorrectly mention it as XB-DUZ.

Being of stainless steel construction, this aircraft will never show corrosion.

BuNo 39307. Strange looking airplane at the Pima Air & Space Museum. Registration widely misquoted as XB-DUZ.

Former XB-QUZ (widely misquoted as XB-DUZ) at the Pima Air and Space Museum. All stainless steel aircraft produced in the mid-1940's