No way to answer without the serial number.
Exactly how is the pistol marked? 9mm browning serial number 72C44338
see Browning.com (HiPower 9mm) 1977
Browning.com has a sn function under customer service
1968
See link.
1971
$450-$750
500 USD
Browning's customer service can assist you.
You must call Browning.
1990.
1989