I’m wondering the same. I see this is a 12 year old post but maybe there is some new blood in the game that knows about this. I seen a case at davenport with an M casted in it and was also told it was a merkel not to be confused with Merch cases. They where a beefier race case was all he said. Does anyone know the era of this? A google search turned up this thread and some Pinterest pictures but no real info.