The letter "u" in the serial number indicates it is a Challenger
This would be a Browning Challenger .22 pistol made in 1970.
YOu will either have to call Browning or see if their website is up and look under customer service.
50 - 400 usd
50-300 usd
100-400
Browning Challenger made in 1974. $300-$400.
1970
$300-$350.
100-250 usd
50-300 usd
50-225 usd
50-375 usd