The 9Z prefix to your serial number indicates that you have a browning auto-5 light weight 20ga.that was produced in 1959.
Browning.com has sn data under customer service.
No serial number = no way to answer
You did not provide the serial number.
62 years old
Made in 1924.
the 9Z prefix dates your browning to 1959.
Made in 1929.
Made in 1924.
Impossible to answer without the serial number.
Made in 1950.
I show no listing for a prefix to the serial number of 1K.Please check your serial number again and repost your question.