Last coin fair I found this unusual Fel Temp Reparatio galley coin, a very barbarous type where the Emperor's nose has been replaced with a piece of string and the ribbons of his diademe are rather unkempt. Of the lettering, not much is decipherable. The reverse was done with more skill, you can even read 'Reparatio' (if you are willing), and the mint is clearly TR or Treveri, Trier in Germania. It's about the same size as an ordinary follis, a rather oval form. According to Bastien (Bastien, Pierre: 'Imitations of Roman bronze coins, A.D. 318-363'. In Museum Notes 30, 1985) these coins were issued in or shortly after 348 following the maiorina reform. This one is much more barbarous than most 'barbs' of these years. AE local imitation of a follis of Constans or Constantinus II. Trier, 348 or later. Obv. Draped and diademed bust right. DN II (…) / PFAG. Rev. Emperor standing on a galley balancing something (no recognizable phoenix) in his hand and holding a labarum, behind him a seated Victory steering. TR in exergue. 22 x 20 mm, 3.1 gr.
Heres an official one of Constans from Trier Constans, AE23. DN CONSTA-NS PF AVG, pearl-diademed, draped, cuirassed bust right / FEL TEMP-REPARATIO, emperor on galley left, holding Victory on globe and labarum, Victory seated to right at the helm. Mintmark: TRP. Trier RIC VIII 219 Ex Bridgnorth 2007
I have a few. Constans and Constantius, Victoriola and Phoenix. I think that these are official. These I am less sure about and believe them to be unofficial.
When I see a barbarous galley I cannot resist pulling this pair of coins out for comparison. The barbarous imitative:- The type it copies:-