How old is your Remington model 11 serial 401192?

Answer 1

Assuming your Model 11 Remington is a shotgun. Remington doesn't date firearms by serial number. Receivers (which have serial numbers) are made during one specific time. Later, at some point the receiver is assembled into a complete gun. Remington, for some reason chooses to use "date codes" that are stamped on the shotgun barrel, so assuming the barrel is the original barrel to that firearm, the date code on the barrel holds the key to when that shotgun became an assembled firearm.

Actually serial list/dates do exist ;)

They are online at the Remington Society of America in the part of the Remington factory log book including model 11's, from my quick list this is a very late shotgun after 1931 (where my quick serial list ends). There is also the date code table there, please see related links.