I may be wrong, but i thought the first generation only read "314"...no cat logo. I bought my first one in ~1995 and that's the way I remember it. Sorry if I am mistaken.
First introduced in both 6 and 12 splice laminations. Switched to 10 splice and added 314 to them. FWIW
Thanks.
Are you sure about when they added the 314? I have an early 6splice with the 314 on it that I bought when they came out.