Althought RIC describes these coins with an eagle on sceptre, all such are not in the style of Siscia.
Not in Alföldi with eagle.

Alföldi table.


1st emission of Siscia, 276 CE.

RIC 644 corr.; Alföldi type 15, n° 4; Siscia. Bust type C. Denomination: Antoninianus.

OBV.: IMP C M AVR PROBVS AVG

Radiate, draped and cuirassed bust right, seen from front.

REV.: CLEMENTIA TEMP

Emperor standing right, holding sceptre, receiving globe from Jupiter standing left, holding sceptre.

Mintmark: ε / XXI

Weight: 3.79 g.

Image provided courtesy of Philippe Gysen


RIC 644 corr.; Alföldi type 15, n° 13; Siscia. Bust type C. Denomination: Antoninianus.

OBV.: IMP C M AVR PROBVS AVG

Radiate, draped and cuirassed bust right, seen from back.

REV.: CLEMENTIA TEMP

Emperor standing right, holding sceptre, receiving globe from Jupiter standing left, holding sceptre.

Mintmark: ligate VI / XXI

Weight: 3.60 g.

Image provided courtesy of Philippe Gysen


4th emission of Siscia, 277 CE.

RIC 644 corr.; Alföldi type 15, n° 16; Siscia. Bust type C. Denomination: Antoninianus.

OBV.: IMP C M AVR PROBVS AVG

Radiate, draped and cuirassed bust right, seen from back.

REV.: CLEMENTIA TEMP

Emperor standing right, holding sceptre, receiving globe from Jupiter standing left, holding sceptre.

Mintmark: / XXIVI

Weight: 3.62 g.

Image provided courtesy of Philippe Gysen