Dating Legend Ti - help!

[msl109]

Hey folks - just finishing build of an (early 90s?) Legend Ti. Would love to know what year it was made. Catologs seem to only get me so far.

Serial: CTI 51 3136
F1 fork with 1"steerer
Got it with a Serotta Ti quill stem 90 degree (wish it were coventional rise, but ok)
Derailleur braze ons on head tube (got an issue with these I'll make a separate post for, but will describe below)
Top tube labeled Legend Ti, not just Ti
What I think is called "sizzler" paint scheme, Pearl white and color changing frost blue (that's what it looks like to me)

can't seem to post pics, sorry.