DrDeath:
SOG Knives with the "massive locks" (aka: 'Negative-Draft Locking Bar System') in the years 1988 to 1991: Tomcat; Stingray; Sogwinder I & II.
Also, there was the SOG Team Leader - a massive SOG folding knife with the "massive lock". However, I have no idea when that knife made it's debut.
By the way, I have a 1st gen Tomcat (S.M. CA.) that I use on at least a weekly basis that has been use to do whatever knives are supposed to do and it is still very strong. The durability is great. Takes a good edge, too!
D1