I think their SM120 is undervalued and they’re a great watch. However, it’s certainly a watch where it pays to take your time, set a sensible budget and buy a good example from the start rather than a doer upper as 1) many of the parts are no longer available, and 2) as they’re skin divers, they can look rough especially with water damage and mouldy lume.
It’s not enough to find a complete/original example, it needs to be attractive too. This one isn’t one I’d be chasing unless it was dirt cheap.
Shame about the case polish. It looks like that was done recently and I’ll bet it looked better before