Srul Fajgielbaum was an inmate of the Sobibór Camp. In a deposition of 5 November 1945, he claimed to have been involved in building the (one) gas chamber at Sobibór. The room’s ceiling, floor and walls were allegedly lined with iron plates, and the execution was carried out with electricity “produced inside the chamber by means of a special motor and machine.”
His claims are rejected as false by the orthodoxy, who insists on several gas chambers operating with engine-exhaust gas. The chambers moreover were not lined with iron plates.