The American School of Classical Studies at Athens has an interesting web site on Athenian Agora Excavations (http://ascsa.net/research?v=default). I found the link looking for information on scale weights. I was surprised when I saw a weight with the inscription: STATER. I do not know the words on the smaller weights. I saw only one Owl in the group, but several turtles. Athenian Weight: Stater, Brass, ABOUT 500 BC Description: Thick square slab of bronze. The metal with a high lead context. On the top, in relief, an astragal. Weight: 795 grams, I could not read the dimensions. Latest 6th , earliest 5th c. B.C.. I liked this pic of bronze coin blanks.