Probus Potin Tetradrachm of Alexandria. Year 4 = 278-279 AD.
Con/ VF/EF; eye-pleasing bronze patina, perfect centering on both sides, complete and legible obverse legend, etc., etc..
Obv/ A K M AVΡ ΠΡOBOC CEB; laur. and draped bust right
Rev/ Year date L-Δ, flanking eagle standing right with wreath in its beak
Ref/ Milne 4589, Curtis 1864, Emmett 3985.