I have never heard of a Constans from Ambianum, as the mint was opened by Magnentius after Constans had been eliminated. There was however a brief issue for Constantius II and Gallus after the defeat of Magnentius and before the closing of the mint later on in 353. Here's a Constantius II from Ambianum: And here is a wonderful Gallus:
Seth, I misspoke myself - not Constans, but Gallus. And the second coin was the one I was trying to link to. Those are the images in the auction that got deleted. Did you win the coin? If so, bravo!
Unfortunately I was the under-bidder on that one. It was the maximum I could do as I had made other coin-related purchases *and* food-related purchases for the wife, the cat and myself.
I feel your pain. I have four kids to feed, three of which are teenagers. My food budget frequently overtakes my coin budget.
I think it could've been worse. I could've been a smoker (the taxes on tobacco here are ridiculous) and a picky eater, which I am not (although the cat is). I kept the picture of that nice Gallus for my records and maybe who knows, one day it'll resurface.
Place me in the category of having plenty of them but nothing close to as stunning as the original poster's examples