Have looked at primal trek - a brilliant website, but nothing yet. Have just now found a possible match to a coin type at calgary coins, also a great Chinese coin online reference. It seems the very earliest of these coins were issued around 300 BC by Chin whilst they were a warring state under the Zhou Dynasty - then much smaller versions of the coin were struck later in the Han dynasty. Still, 48 mm and 29 grams is huge even for the earlier pieces and the condition is rather good - so an interesting piece, and might have a decent value with a bit of luck! Hopefully I can find a piece with a similiar size somewhere, might shed a little more light
www.kingstoncoincompany.co.uk























