here are two nice unofficial issues currently in a ROMA auction; but they seem to think that they are official-- "Possibly a unique variant of an extremely rare type." and "Apparently an unpublished variant." They are both definitely unofficial issues, so I hope someone does not pay a lot thinking that they have unlisted varieties.
Lot 1395.Constans Æ 13mm. Lugdunum, AD 342-343. CONSTANS P F AVG, laurel-and-rosette-diademed, draped and cuirassed bust to right / VICTORIA AVGVSTORV, Victory advancing left, holding wreath and palm branch; S(retrograde)[LG] in exergue. Cf. RIC VIII 37; cf. CNG Mail Bid Sale 84, lot 1532. 0.86g, 13mm, 6h.
Extremely Fine. Possibly a unique variant of an extremely rare type.
Lot 1398.Constantius II Æ 14mm. Treveri, AD 337-340. CONSTANTIVS AVG, pearl-diademed and cuirassed bust to right / VIRTVS AVG N A T, Soldier standing facing, holding spear and resting hand on shield; TRS in exergue. Cf. RIC VIII 73. 1.76g, 14mm, 6h.
Good Very Fine. Apparently an unpublished variant.