This is a nice single layer pen knife in red smooth alox. It has only 2 blades and, measuring only 75mm, it’s a very small, thin, light weight knife. It’s almost the same as the current Secretary and Pocket Pal models, but it’s 1cm smaller. You can see the size difference in one of the pictures (the bigger one is a Pocket Pal).
I think the shield and cross are painted. It’s different from other shields I’ve seen before: the lines are much thicker.
There are no 75mm knives in the current Victorinox line-up. I have no idea when they stopped making them. But since this one has a Victoria tang stamp, it’s probably from the 1950s or 1960s.
The Victorinox Explorer is basically a Climber with an extra layer. The added tools are a magnifying glass and an inline Phillips screwdriver.
This one was made before 1991 since there is no hook on the back side of the scissors layer. Also, the corkscrew is fluted and there is a very thin key ring attachment point near the corkscrew. On newer knives (post 1991), the key ring attaches to the back spring on the reamer/awl side of the knife.
Around 2007 the magnifier was redesigned. The current magnifying glass is made of plastic. The older style is made of real glass fitted inside a plastic housing. Check SAKWiki for more info on the magnifying glass.
This black Explorer is in almost mint condition. It looks like it has never been used. It has probably been sitting in someone’s drawer for 2 decades ;)
This is an alox Victorinox Soldier. This one was issued in 1979 (it has 79 stamped on the tang). There is a Waffen Kontrol (WK) stamp on the front scale and the knife has a hollow bottom rivet for a shackle/bail or a lanyard.
The Cadet is a nice, slim, 2 layer 84mm Swiss Army Knive with alox scales, currently available in several different colors. This one has a small blade instead of a nail file which predates the current tool configuration but is (unofficially) called Cadet II.
This one is pretty old, given that it has ribbed alox scales instead of the current checkered scales. Also, it has the older style Swiss Shield on the front scale.
The Recruit is closely related to the Cadet II: it has the same tool configuration but it has cellidor scales. I once owned a green Cadet (in mint condition) but I sold that one without having taken any pictures :(