On Mar 26, 5:31*pm, "Michael Benveniste" wrote:

How early 18th century?

Hmmm ... yours is much more worn. The Mexican 2 Reales coins of the
1830s were only supposed to be 6.76 gms.

Mine appears much less worn than yours. It is a different design
(shield on one side and cross on the other) and from the Madrid mint
(1761).

You've convinced me; there is a problem. Thank you, everyone.