u/Fine-Upstairs-877

I ordered this Wenger Forester Swiss Army Knife on eBay.
On the side of the blade there is a metal locking lever/liner that seems to lock the blade in the open position. I’m not fully sure how this mechanism is supposed to work or if this is a known variant.
Does anyone know:
what exact model/variant this is?
whether it’s a rare version or a standard production one?
approximate production years?
Any info would be appreciated. Photos attached.

Hello everyone,
I ordered this Wenger Forester Swiss Army Knife on eBay.

On the side of the blade there is a metal locking lever/liner that seems to lock the blade in the open position. I’m not fully sure how this mechanism is supposed to work or if this is a known variant.

Does anyone know:
what exact model/variant this is?
whether it’s a rare version or a standard production one?
approximate production years?
Any info would be appreciated. Photos attached.