This is according to Lazarini, Series III, a probable sixth of a shekel (average weight of five speci-mens, 0.68 gr.) Obv.: Calfs’ head facing left Rev.: Irregular incuse square It took me 20 years of wait and search before I could find one... Of course as Doug said, one's cherry is the others' pit and I am particularly happy that I could get it without the usual nuisance from Clio et al. , although on this occasion I was prepared to overbid him.
The OP coin is very nice, but he could have gotten two boars for the price of one calf : Lesbos 8 mm. Base silver. 1.09 grams. Confronted boar's heads, together making a panther's face. Incuse Hoover 6 (Islands) 1069 "1/12 stater" BMC Troas p. 151 #15 plate XXX.7 Sear Greek 3488 "c. 1.15 grams" "tenth?"
In fact yours is indeed the big sister: It is again interesting to note the persistence of the typically archaic practice of indicating the half of the double by the “half of the type”, i.e. a single calf-head.
+1 and lets not forget the coin has excellent surfaces, fine style and perfect centering 'for these'. Cherry. If Clio et al. did not want that coin, they should have.