Originally Posted by DCWilson

Fixed sight 629 with 3-inch (or maybe 4-inch?) barrel. Very few of these.

I would also look at the rarely seen 631 in .32 H&R Magnum. Barely 5000 made in total, and four different varieties within that range. Probably the rarest is the round butt adjustable sight Kit Gun with a four inch barrel. According to SCSW, about 40 were made in 1998. If you ever seen one of those, just buy it without question.