Salonina: Rome mint or Antioch mint?

Does anyone know how to distinguish between the Rome mint issues and the Antioch issues on the Antoniniani of Cornelia Salonina issued during the joint reign of Gallienus and Valerian I? Now, I'm not saying Curtis Clay at Harlan J. Berk doesn't know what he's doing, but what features--what aspects of style--distinguish between the Rome and Eastern issues of this coin? Am I missing something?

Harlan J. Berk attributes this IVNO REGINAE to the mint in Antioch, RIC 64:



Although quite common, the Antioch issue is apparently less common than the Roman issue, RIC 29, of which 240 specimens are listed in Göbl and 1779 specimens in the Cunetio hoard (according to secondary sources; I do not own or have access to Göbl or the Cunetio report).

In RIC, the listings for #29 and #64 appear identical to me. This coin has the obverse bust 3 A ...



... and the reverse inscription IVNO REGINA, with Juno standing left, holding patera and scepter. This is compatible with RIC 29, from the Rome mint ...



... and with RIC 64, from an "Asian" (Berk specifies Antioch) mint:



Note Cohen #60 is cross-referenced by both listings (Cohen does not distinguish between them):



Note also this is not the IVNO REGINA issue from the sole reign of Gallienus, RIC 92 (minted also in Antioch, by the way), because the reverse of that coin depicts a peacock at Juno's feet and a star in the field at left:

 

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I don't think it's Rome, but can't say for sure.

 

Congrats on those cool OP_coins, Roman Collector

Ummm, I'm not sure where my example was minted ... I always thought Rome (but I could be wrong)

Salonina AR Antoninianus
Date: 257-258 AD
Diameter: 23.6 mm
Weight: 3.3 grams
Obverse: SALONINA AVG - Diademed and draped bust of Salonina
Reverse: FELICITAS PVBLICA - Felicitas seated, holding caduceus and cornucopiae
References: RIC 6

 

I don't have an answer, but would like to know as well how the attribution to Antioch is made. Surely one of our experts here will have an answer. The only thing I can imagine would be the on the style of the bust.

 

Eduard is correct. This mint attribution is purely down to the style of the engraving.

 

Just to compare the portrait styles: here is my Salonina engraved in Cologne-mint- (Göbl 900c, he knew of 22 specimen)

 

Hmmmm.......

I keep wanting to see a little "W" mintmark... we know that it would not be West Point Mint, so it HAS to be Winnipeg Mint ! YEAH, that's it...