Milbank

Milbank, S. The Coinage of Aegina. Numismatic Notes and Monographs No. 24. (New York, 1925).

66 pages, 5 fold-out plates. An early but still valuable study of the turtle coinage of Aegina. 12mo. Tan card covers.  Rare.  Copies sell for $100 - $350.

Available online: http://babel.hathitrust.org/cgi/pt?id=uc1.%24b460910

Aeginetic standard

Didrachm or Stater ... 12.57g
Drachm................ 6.28g
Hemidrachm or Triobol  3.11g
Diobol................ 2.07g
Trihemiobol........... 1.55g
Obol.................. 1.04g
Hemiobol...............0.52g
Tetartemorion..........0.26g

The plates online are bad so we have put better scans here...