Got these 2 gas masks, M38 the rubber and M30 the canvas I assume and wanted to know more if possible about them. Is the rubberized common or the canvas one ?

I cant seem to find information about some manufacturer’s code like clf on the interior, or "btc" / "hsr" on the nozzle.

Both of them are latewar 1944 issued and I cant seem to be able to fit the rubberized one in the higher container lol … doing something wrong but wont fold properly to be insrted.

Any help would be much appreciated.