Watch List notes:

Gallienus. AD 253-268. Antoninianus (23mm, 3.38 g, 5h). Siscia mint. Issue 1, AD 262-3. GALLIENVS AVG, radiate and cuirassed bust right / VIRTVS AVG, emperor standing left, holding globe and sceptre; captive kneeling at his feet. MIR 36, – (1405ff var., two captives on rev.); RIC V (sole reign) 590 var. (same); Cunetio –. Near EF, wonderful silvering. exceptional strike.

Ex Gorny & Mosch 216 (15 October 2013), lot 3218.

This reverse, with just one captive, seems otherwise unrecorded.