Original M/41 filter for the M/30 gas mask.
This filter was manufactured in 1944. There is an M/41 model stamp, KSS gas equipment stamp, SA army property stamp, 20.10.1944 and 15. VI. 1956 inspection date stamps and 607422 gas mask number stamp on the filter.
The original screw cap is missing, but the bottom seal is present. Good condition filter for a collection.
See photos for details.