Here is only the 3rd specimen of this antiochene mule minted under Gordian III
The obverse show us the draped and cuirassed bust of gordian only minted in the 1st part of the second issue but the reverse show us 1 of the 3 most usual types of the second part of the second issue SAECVLI FELICITAS.
The 2 others coins are from Eauze and Rocquencourt hoards and was minted with the same pair of dies. This coin was minted with 2 different dies.
This type is the only one of the second part of the second issue series known with this kind of bust.
Only 2 kinds of mules are known in Antioch during Gordian's reign, the other is a realy strange mule minted with an obverse of the 1st issue (239AD) IMP CAES MANT GORDIANVS AVG with a reverse of the 1st part of the second issue (242-244) FIDES MILITVM Fides standing front head left holding 2 vertical standards.
here is a picture of the second type of mule in a french collection,
Only 3 or 4 others specimens of this mule are actually known
1 in the British museum,
1 in a german collection,
1 showed on this forum with a mistake on obverse
1 from Dorchester hoard (which is maybe one of the others)