Watch List notes:

Attica, Athens (c. 138-9 BC), AR Tetradrachm, 16.46g, 'New style', helmeted head of Athena right, rev. owl standing facing on amphora; Tyche with amphora to right (Thompson 753a), hints of attractive iridescent tone, very fine.
Provenance
Christie's auction, 14 July 1987, lot 40
Estimate: £200 - £300