Wait for other(s) to confirm, but rookie here - seeing what looks like as you described a filled mint mark. The center post that forms the inner portion of the mint mark was broken or chipped away thus filling the cavity. Believe this is an error, but a common one.
The comparison pic is not filled. Can not comment on RPM status with current pics. Would need something a little more close up. An Ike or RPM expert may can add something more definitive on any bicentennial RPM's. Thanks, Doug.
The comparison pic is not filled. Can not comment on RPM status with current pics. Would need something a little more close up. An Ike or RPM expert may can add something more definitive on any bicentennial RPM's. Thanks, Doug.





















