this post was submitted on 25 Apr 2026
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What is this thing?
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Let us help you identify that mysterious object you’ve found.
Currently in CHALLENGE mode: If you've got something obscure knocking about, post a picture, and let's see how we do. Please prefix such posts with "CHALLENGE:" so we know we've got a fighting chance.
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My suspicion is it could be almost ANY kind of gas cylinder.
Least likely is AIR. Doesn't look like a scuba cylinder.
That leaves medical, military, and scientific applications. Where are you, and where was this cylinder found?
Australia, and in the bush adjacent to my house. I live on acreage with no neighbours in that direction. Won’t be military, not even historically.
I reckon that's an old gas valve on top. Does it turn?
No, no movement at all