I think this must be Campingaz (butane) size 907. The outer is pretty rusty, but there are no dents etc, and when you unscrew the top bit, it looks fine. It weighs 3750g, so it may have about 50g of gas in it. In the photo our food waste kitchen caddy is next to it for scale.
For collection from Taverham
Campingaz bottle (Taverham NR8)
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