I was wondering if any E-Sylum reader might be able to throw some light on the chop mark on this Oliver Cromwell Crown of 1658.

Weight is 29.91gms, Cromwell crown 1658/7, early production. I suspect these were used for trade activities hence the interest to find out if this chop mark can be identified as it might prove the theory that these were in fact trade pieces. A Dutch connection is possible.