Would agree that the advert has the jewel count wrong as all HEs were 21J without exception.
So His Excellency 'D' it would appear to be.
I wonder how many more advertised Jewel count typo's there are out there?
This example is obvious as We know what We are looking at but there are numerous Watches listed as 'UNKNOWN's' in the database due to their Jewel counts not matching the ad.
Many listed as unknown have ads for them too.