Just found these in my pile last night and wanted to share. Not much Byzantine goingaround lately anyhow. They were part of a group of 79 pieces that also yielded a Tiberius As and an Aes Grave.
There are some problems with the attribution of the nummus. See below.

Justinian I, AE Nummus, Carthage.
Obv: Pearl diademed, helmeted, cuirassed bust facing. No legend.
Rev. Six pointed star within wreath.
Problem: SBCV (my paper copy) does not list just a six pointed star within wreath in the Carthage nummus section. So I went over to Wildwinds for a quick check. They have this listed as SBCV 283 which my paper copy says is a Chi Rho with stars. Dumbarton Oaks only lists what my SBCV has listed. This is not a Vandalic imitation, I believe, as the quality id too high. I looked through Dumbarton Oaks for Vandalic imitations and none match anyhow. Any thoughts.

Justinian I, AE Pentanummium, Carthage.
Obv. [DN IVST]ININANVS PP AVG, diademed bust, right.
Rev. E with cross to right within dotted circle within wreath.
SBCV 274.