Before 14, how can Joe's golden leg be distinguished from his real leg?

The authenticity of Joe's golden leg can be identified in the following two ways:

1. Appearance comparison: If there is a channel to verify the authenticity, it can be compared with it, including details such as appearance, logo, material and technology. Authentic products are made with high quality and fine details.

2. Quality inspection: you can contact a professional inspection agency or an authoritative qualification certification agency to inspect the material, composition, technology and quality of the products. Authentic products meet relevant quality standards.

The above information is for reference only. It is recommended to consult professionals or authoritative organizations to obtain accurate information.