Browning's web site has a sn search function.
1970. You can request a factory letter for @ 40 USD
1926
Ruger's website has sn data you can access
You will have to check the link.
1957
1912
You will have to post the sn or call Browning.
Browning's web site has a sn search function.
Proofhouse.com has sn information.
No sn data available.
Around 1912.