Could it be that your browning hi-power is marked 70C19171? If it is then it was made in 1970.
What is year of manufacture of a Browning Shotgun A-5 with serial number 01553NP111?
No serial number = no way to answer.
You will need to call Browning.
YOu must call Browning.
1988
No serial number provided.
You will have to call Browning to find out.
your browning was made in 2005.
1986
Impossible to answer without the serial number.
Use the link to date this Browning
You will have to call Browning.