Æ26 - Gallienus (sole reign) (ΛΑΚΕΔΑΙΜΟΝΙωΝ, ΑϹ Δ)

Sparta's civic bronze coinage under Gallienus belongs to the final gasp of Greek provincial issues — the city's minting activity ceased entirely around the time of the Herulian sack of 267 AD, which devastated much of southern Greece. Whether this particular piece predates that destruction or squeezed out just before the city's collapse into disorder is impossible to determine with certainty, but the window is narrow.

The ΑϹ Δ in the reference suggests a fourth year of a local magistracy or civic reckoning — an administrative detail that has resisted firm scholarly consensus on its precise correlation to absolute dates.