Impossible to answer without the serial number.
Your browning hi-power was made by browning in 1967.
1976
You will have to call Browning with the serial number to find out.
You will have to call Browning. Your sn does not appear in any reference I have.
Made in 1981.
No serial number = no way to answer.
Use the link to date this Browning
You must call Browning with the serial number to find out.
1986
1947
Browning.com has sn data under customer service
The 2 letters PY found in the serial number sequence indicate that your Browning High Power was made in the year 1982.