One of the big issues, and indeed the reason behind SAKWiki, is that there is not really a lot of actual information regarding various models and dates of a lot of knives. So, by pooling everyone's info together, we hoped to build a clearer picture of what was done and when.
Wenger is particularly difficult to find info on, as a large portion of their factory burned down in 1986, destroying pretty well all of their records. So, while I can say pretty certainly that if it isn't on SAKWiki, it's not likely that any of our members have encountered one. That having been said, guys are uncovering previously unheard of models all the time, so it is potentially out there.
Def