yes
How much is a old black powder only 45 cal long barrel pistol worth?
No published sn data
Call Browning and they can tell you.
Old gun catalogs and magazines.
Unknown.
50-500 USD or so
This gun was manufactured in 1970...so, 39 years old.
Browning.com has sn data under customer service.
Proofhouse.com has Colt sn data.
Try Old Western Scrounger
Impossible to answer without a detailed description.
Ruger's website has serial number data on its products.