From a Weir interview you can find on Dozin:
What were your first guitars?
"My first was a $17 Japanese model. Then I got a $35 Harmony classical, and it was okay. When I was 15, I ran away from home to cowboy for a summer and make enough money to buy a Martin D-28 from a pawn-shop. A little later I found a really nice 1944 Martin 000-21 in a pawnshop for less than $100, as I recall. Those were the old days.
I played that until I got my first electric, which was a Gretsch Chet Atkins model. Then I got a Gibson ES-335, and later on tried a Rickenbacker, which was a great little guitar. From about 1968 to '71 I used a Gibson ES-345, until I switched to a Gibson SG. I had been playing that for about three years when I met Jeff Hassleberger from Ibanez. We hit it off real well and started working on desingning a guitar. It was about 1975 when I got my first Ibanez guitar, and it's pretty much a continuing progression of them ever since. They all look the same, but they're real different."
I remember reading a different interview where he talks about he and Jerry trying to stay out of each other's ways- tone-wise. If Jer was using single coils Bob would usually shift over to something with humbuckers.
Interesting to hear him say he liked the Ric. Not many photos of him with it- I wonder why he moved away from it- and never returned?