What is the age of my Columbia single shot shotgun serial no 219118?

To determine the age of your Columbia single shot shotgun with serial number 219118, you would need to consult specific production records or reference materials related to Columbia firearms. Columbia shotguns were produced primarily in the mid-20th century, so based on the serial number, it might be from that period. However, for an accurate dating, checking with a firearms expert or resource specializing in Columbia firearms would provide the best information.