The Holocaust Historiography Project
Auschwitz, by J.-C. Pressac
The gas-tight shutters for the Zyklon-B
introduction openings of Krematorien IV and V
In 1982. the author found and photographed in the former coke store of Krematorium I in the Stammlager three gas-tight shutters from Krematorien IV and V.
Photo 28 Photo 28:

Presentation of the three shutters, referenced from left to right:

PMO II - 5 - 64/1
PMO II - 5 - 64/2
PMO II - 5 - 64/3

Photo 31:

Verso of the order of 13th February showing that the metalworking shop completed its work on24th February and the woodworking shop on 25th and that the twelve “doors” were ready on 26th. On 28th February, six of them were installed in the western rooms of Krematorium IV under the designation “gas-tight windows”. On 2nd March, the place where these “windows” had been fitted was referred to by a Riedel & Son employee as a “gas chamber”.
Photo 31