Curtis Hedman , Oct 18, 2009; 08:11 p.m.
This sound like one of the last "Pre-Spotmatic" models, though mine (with a similar clip on light meter) is a Pentax SV. I would say that it is more of a collector's item than a day-to-day user... the light meter requires a mercury battery (or substitute) to function. This is one of the "SM" line of Pentax cameras, where "SM" stands for "Screw Mount", referring to the M42 screw mount lenses, as opposed to the "K" series, which use a variation on the "K" Bayonet design to mount the lenses.
The camera may be in fine working condition, and M42 lenses can generally be found almost anywhere, so this could be a reasonably low price entry into the Pentax SLR world... but you may find it limiting fairly quickly, compared to one of the later generation Pentax SLRs. I rarely run film through mine, which was given to me some years ago along with a few interesting SM lenses.