Murph,
Thanks for taking interest.
Yes it does have a 5 inch barrel. Serial number is 29656. Six cylinder, 32 cal rim fire
I now think it may be a S&W Model 2 Army, 3 pins
https://en.wikipedia.org/wiki/Smith_&_Wesson_Model_No._2_Army
This site is partially down and won't let me attach a photo...