Browning.com has sn data under customer service.
Your browning hi-power was made by F N in belguim for browning in 1968.
Your browning hi-power was made by browning in 1967.
your browning hi-power was made in 1974.
Your browning high power was produced in 1980.
1980.
The RN in the middle of your serial number indicates that your Browning Hi-power was made in the year 1997.The Browning Hi-power is produced by FN in belguim.
The letters PM in the serial number sequence indicates that your Browning HI-Power handgun was made in the year 1980.
The 2 letters NY in the middle of the serial number indicate that your Browning Hi-power was made in the year 1992.
Your browning hi-power was made by FN of belguim for browning in 1969.
Proofhouse.com has Browning sn info.
Could it be that your browning hi-power is marked 70C19171? If it is then it was made in 1970.
It was made in 1987