Nothing special; but Serdica coins are a bit tougher to find. This is only my second example for Maximinus II. The mint in Serdica opened in A.D.303 and closed in A.D. 308; so this was the last series struck by the mint. For its last year, showing the breakdown in the Tetrarchy system; Serdica only issued coins for Galerius, Maximinus II and Galeria Valeria.
Maximinus II
A.D. 307- 308
Ӕ follis 22x24mm 6.6g
GAL VAL MAXIMINVS NOB C; laureate head right.
GENIO CAESARIS; Genius standing left, modius on head, naked except for chlamys over left shoulder, holding patera from which liquid flows & cornucopiae; ✶ in left, Δ in right.
In ex. •SM•SD•
RIC VI Serdica 37