Actually by all accounts the RM stated that the Pemember coin was not an error the right leg downstroke of the R was masked by the reeding . Strange though that only this coin was chosen to be published. If you look at all the early silver Charles II most of the coins are of that type either standard B with the bottom or the top missing.Yet none of those were chosen for publication as an error type designated as RR for BR or inverted RR for BR? Unless I missed anything thumbing through. But I understand the premise with F. being a broken E but yeas it does look like an F. Unbarred A or inverted V's look as the description I just feel that this particular error because of the way R,s are made doesn't really hold as much validity . It is the pretender to the throne error