Hello DaveZ,
Welcome! The serial number that you gave, ds-175, doesn't make sense to me, but I was wondering if it's a typo and you meant to write SD-175. In that case it could be a Guild JetStar bass from 1966. If that's what it is, you have what is often referred to as the 'Monkees' version of this bass, with the 4-in-line tuners on the headstock and 1 small single coil pickup with a white cover; that is ....... if it's still original.
Value would depend on the condition of the guitar, but maybe you could show us a photo of the bass first, so we can determine what it really is.
If you don't know yet how to post photos, just go ahead and send them to me at:
guitarchives@wxw.nl
Sincerely,
Hans Moust
www.guitarsgalore.nl