Eagle Standards

[Purplest]

So from what you're saying, its possible that one legion's eagle could be different from another legion's eagle. In style, the way it was constructed and possibly even that it could've been in silver or gold. I tend to agree with you in that it was probably hollowcast or sheet metal as it would have been light enought to carry and handle, and being metal would've been more durable than wood. The solid metal would've been too heavy I think. I also believe it's possible that no two were alike. I think depending on where a legion was stationed, and who was constructing it, they would've maybe put their own style on it or have been influenced by things in their region. 

Cheers,
Thomas