How do you tell how old a GI Joe doll is?

To determine the age of a GI Joe doll, examine its markings, packaging, and design features. Vintage dolls typically have specific trademarks or logos, with early models from the 1960s often having a more realistic appearance and articulated limbs. Additionally, the type of clothing and accessories can indicate the era, as styles changed over the years. Consulting collector guides or online resources can also provide insights into the specific year of production.