It's interesting.
@Giffro 's 91 Dyna 5 must be the earliest production of the 2nd Gen Dyna. My Dyna 5 is also from '91, but has the SFs and typical 80s era Dyna features, and therefore the latest production of the 1st Gen. It does have a flatter radius fingerboard (12") than stated in the manual for the SF Dyna 5 (8"), perhaps Peavey was transitioning into the next generation specs..?
Mine was a $150 bargain, but was a basket case that took a
lot to get it back up and running. It is originally metallic grey, but received a cool and well done green burst on the body. I had to rebuild all of the pots, replace the switch, get two replacement tuners, find a rear control plate, used the knobs from my Dyna 4 (which got cool black metal knobs) and the neck had to take a trip to Warpedneck.com and get two treatments to get back to straight and true. I spent about 3 hours time and about $225 extra on it. I like the bass, but I would like the 2nd Gen Dyna better as it addressed some of the issues that plagued early 5 string basses. It has wider string spacing, pickups that work properly for 5 string spacing and tweaked the neck and electronics for 5.
Oh, the black Dyna 4 has since ditched the green strings tuned BEAD and now has regular strings tuned EADG and sports a Hipshot Xtender on the low E.