Hi guys For sale is my Grand Seiko 5646-7010 (automatic) made in 1971. 28,800bph hi-beat 25 jewels. Date has Japanese characters (aside from English). Case diameter is approx. 35 mm before crown. Full disclosure, some parts of the case look smooth, which could be signs of being polished. I'm not so sure though as the watch looks awfully similar compared to other examples online. The pics don't do the watch justice as it's hard to take representative pics of its nice, silver dial. Price of watch (head only) net to me is USD 800.00 (after Paypal and shipping).