Hi Altamura,
Thank you so much for your response. I will look at those references and I always appreciate it when you post references that I have not heard of. Sorry for forgetting weights/sizes, I wasn't sure they were necessary for this one.
-For ΔI coin, 6.19 grams,
AE17
-For bucranion coin, 6.14 grams,
AE18
They are very close in size, really. On the first one, I thought I saw vestiges of a rider, but it is very faint and I may be seeing it because I think it is supposed to be there.
Thanks again,
Virgil