One coin each of all 77 legitimate Roman Emperors from Augustus until the permanent division of the empire in 395 AD.

Where is this displayed ?

They seem to be made of different materials, who made the call on what do use for coins ? Was it up to availability ? Was the same material used for all coins under the same emperor ?

Since the emperor is likely involved in the process of creating the new stamp I wondered if they had any say in it.

I think it interesting that most face right, but a few face left - i wonder why or what qualities about those leaders caused them to diverge from the norm and go left

Take them all and shove them up your ass. It’ll give you the upper hand.

Why not keep going until 1453?

They did it. They are the pokemon master now.