Mario Latendresse (see his wonderful site) tells us:
For a Byzantine coin representing Christ with a swelling cheek, an impressive example is from the reign of Constantine VII. It was minted in 945. See
http://www.sindonology.org/byzantineCoins/coins.shtml
for descriptive text and photographs of that coin.
Check it out. On Mario’s site you can click to enlarge it. The comparisons to the shroud image are amazing.