Etruria, 300-200 BC., unknown mint in northern Etruria, Uncia, SNG Firenze 1056-1064.

unknown mint in northern Etruria (probably Arezzo, or Cortona or Chiusi), ca. 300-200 BC.,
Uncia (ø 21-22 mm / 8,34 g), bronze,
Obv.: six-spoked wheel, value mark: one pellet between spokes, linear border.
Rev.: anchor with loops at both ends, crescent and dot flanking (value?), dotted border.
SNG Firenze 1056-1064 ; SNG Spencer-Churchill 3 ; SNG ANS 42ff. var. ; HN Italy 67 var. ; http://www.acsearch.info/search.html?id=1713967 .

thanks to Nick Molinari and Nico ("Taras") for supporting the ID.

Nico added on 31/1/2015:
"For this fractional two variants are known: crescent and (reversedF) (digamma). The meaning of those symbols is unknown, they appear also on heavier cast denominations for these types, among other monograms or symbols ( reversedN , Judean_gimel_1 , A); old theories about reversedF as abbreviation for Vetulonia or Judean_gimel_1 for Populonia are are no longer accepted by scholars.
The oncia is the only denomination minted for the series, all the other heavier fractionals are cast (quadrante, semisse, asse, quincusse).
The mint has not yet been identified, according to F. Catalli the archaeological data suggest the inland area of northern Etruria, between Chiana Valley and Elsa Valley, probably Arezzo, or Cortona or Chiusi."