You must call Browning to find out.
Your Browning lightning superposed shotgun was made in the year 1968 with the serial number that you have provided.
Under the lever.
You must provide the serial number in order to get an answer.
You can access the date of manufacture of many Browning firearms at the Browning website, under Customer Service.
Need serial number to start with.
It will be marked on the barrel where it was made.
Browning.com has sn data under customer service.
Browning.com has sn data under customer service.
The Browning website has fairly good year of manufacture data. Look under customer service.
Browning.com has a sn function listed under customer service.
100-2000 usd
Browning.com has sn data under customer service.