Here is one from another well known seller that is described as 34a.
Here is the picture and seller's description for reference. The only difference is in the weight and die axis

Description:
Gratian AV Solidus. Thessalonica, AD 379. D N GRATIANVS P F AVG, pearl-diademed, draped and cuirassed bust right / VICTORIA AVGG, two emperors seated facing, holding globe between them; above, Victory facing with spread wings; below, a palm-branch; TESOB in exergue. RIC 34(a); C. 38; Depeyrot 34/1. 4.38g, 21mm, 11h.
Extremely Fine. Lustrous metal.
Ex Lanz 28, 7 May 1984, lot 817.