Wall-mounted can openers (Norham Manor OX2)

I have three. They all have their wall mounting plates, you just need screws to attach the plates.
The one in the middle on the first photo has a pin mechanism so it can swivel back to flat against the wall. It also has a crown cap (beer bottle) remover built into the body.
They can all be temporarily removed from the wall (eg for cleaning) by lifting them up off the plate.
These are vintage items. Different ages. Good for a retro kitchen! I cannot swear how well they work but I believe they do.
You can probably buy replacement parts that pierce and cut the tin as these look standard to other manual tin openers in which case they can be replaced and made good as new. I have not tried looking though so I can’t be sure.