What is the age of a 12 gauge Winchester Model serial 639072?

To determine the age of a Winchester Model 12 shotgun with serial number 639072, you can use the following steps:

1. Identify the date code: Winchester used different date codes to mark the year of manufacture on their firearms. For Model 12 shotguns, the date code is typically stamped on the barrel or receiver.

2. Look for a two-digit code: The date code on your Winchester Model 12 should be a two-digit code, such as "12", "23", or "45". This code represents the last two digits of the year of manufacture.

3. Add 1900 to the date code: To determine the full year of manufacture, you need to add 1900 to the date code. For example, if the date code is "12", the full year of manufacture is 1912.

Based on the information provided, the serial number 639072 does not have a corresponding date code. Therefore, I am unable to determine the age of the firearm.