Your H&R is in .32 S&W caliber, and it's a pretty old example-
maybe as old as the 1880's. It seems to not have the rebounding hammer thet newer versions had.
Check this site: http://armscollectors.com/faq.htm
and find the forum for H&R's. It's the best source of information on these old revolvers anywhere.
If the nickel plating is still good,the grips are not broken and the gun is in working condition, it may be in the $100-$150 range.
It is probably designed for black powder cartridges, and I would not shoot it.
If you remove the grips, be very careful-they are hard rubber and are very prone to breakage after all these years. I believe your H&R is about 1888 or so. They were made till WWII, but with many design improvements. Many were carried daily and show lots of use and neglect, but they were self- defense guns
for a lot of people in their day, and they deserve more respect than they get.