3 way tie for me ... 1965 Hofner 500/1 Beatle Bass 1965 Gibson EBO signed by Jack Bruce & Allen Woody 1965 Mosrite Celebrity I
All but one of my basses are mid to late 90's models but I do have a Cort B2A 'Steinie' copy that was made in the early to mid 80's. That's as far as I go back. If I still had my old Univox, that would be early 70's.
67 P w/oval tuners Currently at TBer Hambone's for a cleaning/setup/photos and soon will be for sale!
'58 Fender Precision that I bought in '67. It's been mod'ed a lot over the years, nowhere near "mint" stock collectable, but it sure plays nice. Now, if it only had 5 strings instead of 4 . . .
My violin bass i believe is from the late 1960's or early 1970's http://www.talkbass.com/forum/attachment.php?attachmentid=13700