Found this info via Google Old Fuff
October 23rd, 2005, 09:26 AM
Harrington & Richardson was one of the "old line" gun companies that started in the latter 1800's. Unfortunately they went out of business in 1986.
The model 622 is a 6-shot, solid frame, .22 revolver of middle-range quality. It is sometimes is called a "pull-pin," because to eject the fired cases or unload loaded cartridges you have to pull out the center pin, remove the cylinder, and then use the pin to push out the cases and/or cartridges. All of this is simple, but unhandy.
It was made from 1957 through 1985, but similar models go back to the 19th century. It was obviously a popular design, primarily because they cost far less then others.
H&R made it
1969
IIRC early 70s
H&R
The serial number prefix of the letters AJ indicates that your H&R model 622 was made in the year 1972.The model 622 was made from 1957-1973.The price range of these .22cal 6 shot revolvers is from 65-150 dollars,depending on overall condition and a good bore.
S&W can tell you when it left the factory if you call them.
50-250 usd
150/350 usd
10-100 usd
50-200 US Dollars
50-250 usd
Crosman no longer makes the Model 622. It was in production from 1971 to 78. I don't believe you can find one in a store anymore.