what's this?

[Jurek]

There were loads of these littering the house, sheds etc. when I was a child.  AIUI you can do bottle caps with the blade in the closed position and open Tim's with the blade deployed.  Handy little gizmo.

Open Tim's what?

Wallet?

You'll need something heftier than that....

The oxy-acetelyne kit is over there >>>>>>>>>>>>>>>>>>>>>>

[chopstick]

I used to have a few of those can-openers from compo rations from the CCF at school (70s).  I bought a couple a few years ago for camping but they were no where near as good as I remember the "genuine" ones being, so I replaced it with a "Nogent Super Kim" (no relation to our Kim, I understand)

https://www.youtube.com/watch?v=XcqRt8Oewpk

[Blodwyn Pig]

I used to have a few of those can-openers from compo rations from the CCF at school (70s).  I bought a couple a few years ago for camping but they were no where near as good as I remember the "genuine" ones being, so I replaced it with a "Nogent Super Kim" (no relation to our Kim, I understand)

https://www.youtube.com/watch?v=XcqRt8Oewpk

Do the ears fold down for ‘stowing away’?

[chopstick]

Unfortunately ,no. It's no where near as bulky as a "regular" tin opener but a lot more bulky than the compo ration type.  It has some weight to it too - 89g according to my scales.

[ravenbait]

I used to have a few of those can-openers from compo rations from the CCF at school (70s).  I bought a couple a few years ago for camping but they were no where near as good as I remember the "genuine" ones being, so I replaced it with a "Nogent Super Kim" (no relation to our Kim, I understand)

We had one of those when I lived on a boat. No idea where it came from. That would be the very early 80s.

Sam