Lloyd, you can check the Home page of this site, under "Other Useful Information" to find serialization and production dates of many better brands of double shotguns.

https://www.doublegunshop.com/dgsnos.htm

Simply providing a link to these pages has proven useful to show some sellers that a particular gun is a pre-1899 Antique that does not require an FFL Transfer. Of course, some will never permit themselves to be confused by facts. Happy hunting for the Crass parts.

A true sign of mental illness is any gun owner who would vote for an Anti-Gunner like Joe Biden.