It depends on how much you already know about the coins you have. If you can identify the Emperor, or at least narrow it down to a few rulers based on the legends or images on the obverse or reverse, you can use the thumb nail images to give you a quick visual check.
What kinds of coins are you collecting? There might be other resources that could help you as well (tesorillo, catbikes, or even a google image search can also be very useful when you're stuck)
What kinds of coins are you collecting? There might be other resources that could help you as well (tesorillo, catbikes, or even a google image search can also be very useful when you're stuck)























