Have you tried a web search? Local Library? Do a web search on Harrington and Richardson Books and you will find some sources.
Depends on condition, caliber, etc.. Prices can range from 100-700 USD
Not enough information provided for clear answer. Description of type of "pistol" - semi-auto or revolver, markings on firearm, type of action, etc. needed.
50-75 or so
About $100.
"P" prefix indicates 1953
1940's-1950s.
1941
Try Gun Parts Corp
25-175 usd
50-100 USD
The value of a Harrington & Richardson Sportsman .22 caliber double action revolver, such as the one with serial number K3629, can vary based on its condition, age, and market demand. Generally, prices for these firearms range from $150 to $400. It's best to consult recent sales data or a firearms appraiser for a more accurate estimate specific to your revolver's condition and any unique features it may have.
Need more information. I Cannot find a reference to an H&R Model 25 bolt action rifle