Here is my siglos. I was looking for a IIIa in particular. I found one being offered by a very reputable dealer in Beverly Hills. I purchased it came to the same conclusion as yourself. My siglos is a tad heavy for the type and in the state of preservation it should in theory be heavier. I dont doubt the authenticity of my piece or the correctness of the site stated above. I belong to the school of thought that the weight constraint has a greater tolerance than what is previous believed and these coins were minted at several mints, not just Sardis, Lydia or Susa as is the current broad understanding.
Achaemenid Kings of Persia
Time of Darios I to Xerxes I c. 485-450 BC. Time of the War with Greece
AR Silver Siglos 17 mm x 5.51g
Sardes Mint
Persian Hero King in Kneeling -running stance right, holding spear and bow
Reverse: Incuse punch, bankers mark.
Ref: Carradice Type IIIa (pl. xi, 14); Carradice, " Two Achaemenid Hoards", in NumChron 1998, 136-7.
Note: Near VF, Good Metal.
