A handsome watch to be sure; I've always been a fan of that case style. Others would know more about this than I do, but I'm pretty sure that's not an original Spaceview. It also looks like a recent Clark crystal rather than an original Accutron crystal. What Spaceview M said regarding the battery is very important; the watch should have been rephased to use the garden-variety 1.55v battery, and if it hasn't been, you're probably going to end up having to pay for this (usually as part of a general overhaul) probably sooner rather than later. This appears to be something of a Frankenwatch, probably worth a few-hundred bucks. If you're looking for an original Spaceview or something that's collector-grade, I'd skip it and keep looking. But if you're just looking for a conversation piece that'll look good on your wrist and it's under $350 or so I'd think about it, factoring in whether it had recently been serviced, the seller's reputation, and any guarantees, etc. There are a lot of Spaceviews floating around out there, and there's no need to jump on this one without making sure it's exactly the right one for you.