The MOP round and octagonal are virtually the same letters and embellishment.

Trying to compare monogrammed metallics with other engravings can be very difficult since even those MOP and metallics (clay, plastic or bone) from the same establishment can greatly differ... and, even two metallics from the same establishment can be greatly different.

EXAMPLE:

Thus; trying to match a monogram with another gaming device, letterhead, gate or door and façade monogram along with any other printed documents is a must in order to enter such device in ChipGuide as being from a particular establishment... and, the submitter should not assume nor, should the administrator for that gaming jurisdiction not question anything they feel may have been assumed and, utilize this forum or any other forum for advice...

It is NOT a bad thing to submit something as being unknown...