Your browning hi-power was made by browning in 1967.
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 will have to call Browning to find out.
your browning was made in 2005.
Go to Browning's site, Support, Date Your Shotgun.
The 2 letters PY found in the serial number sequence indicate that your Browning High Power was made in the year 1982.