A few years back, when my garden knife 'went missing' from Haddock's, my then neighbour (now sadly deceased) showed me the above and asked if it was the one I'd lost.
It wasn't. Mine was an old fixed bladed kitchen knife, so she said 'just keep it anyway'; and I did.
I re-discovered it recently, gave it a good oiling and cleaning, and I'm now using it again (in her memory).
I have a feeling that it's a home-made knife. I know that knife making is a popular pastime in France, and it certainly looks very amateurish.
The blade on my regular Opinel pocket knife had become rather loose, and was opening whilst in my pocket; I have the scars to prove it. The one above is quite pleasant to use, and the blade stays in place.
Whilst Lady M was recently away gallivanting, I did consider buying myself a traditional 'Nontron' pocket knife, as an alternative eating knife to my Opinel. They are our local knives from a bit to the north of here, but when I saw the prices I decided to stay with my Opinel. A quite simple 'Nontron' knife starts at about €60, and goes into the €100's; way beyond my pocket.
p.s. Having put a 'friendly' notice on the garden gate at Haddock's, my knife was later returned. I have no idea who had half-inched it, but I was pleased to have it back. Naughty, naughty.