How old is a 12 gauge Hercules grade double barrel shotgun manufactured by Iver Johnson and Cycle works with a seriel number of 5165e?

To determine the age of a 12-gauge Hercules grade double barrel shotgun manufactured by Iver Johnson, you would need to consult historical records or reference guides specific to the company, as the serial number can help identify the production year. Iver Johnson produced shotguns from the late 19th century until the mid-20th century, so the age could range from several decades to over a century. However, without specific production year data linked to the serial number 5165e, an exact age cannot be given. It's advisable to reach out to a firearms historian or a collector familiar with Iver Johnson shotguns for more precise information.