H&R
H&R made it
1969
IIRC early 70s
Go here for some information - http://www.littlegun.be/arme%20belge/artisans%20identifies%20q%20r/a%20robar%20gb.htm
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.
The H&R Model 622, a .22 caliber revolver, typically has a value ranging from $150 to $300, depending on its condition, age, and market demand. Factors such as original packaging, included accessories, and overall finish can also affect its worth. For an accurate appraisal, it's best to consult recent sales data or a firearms expert.
S&W can tell you when it left the factory if you call them.
150/350 usd
50-250 usd
50-200 US Dollars
10-100 usd
50-250 usd