ST 1851 A - Date: Slim 5 - has a flat top which ends in a point. 5 is upright.
ST 1851 B - Slim 5 - As "A" but 5 tilts slightly backwards. Slightly thicker, squat 1.
ST 1851 C - Obv. E over E in REGINA (Double re-entry; below & 2 the right)
Date: Slim 5 - As "A" the 5 is upright but 5 over 5 (faintly - just to the right) !
ST 1851 D - Date: Slim 5 - As "B" slight tilt and 1 over 1 of "51".
ST 1851 E - Date: Thicker, fatter 5 - has a curved top with a ball end. Very slight tilt to 5.
The 1 is thicker also. This type of 51 appears to be the rarest type.
ST 1851 X - 5 over 8 !
This is only the 2nd example that I have seen of this very rare variety and unfortunately
the coin was in a plastic page and I had to scan it through the plastic covering.
The other example is on the Tony Clayton web page/
The date reads "1551" It appears that the 'repairer' struck a 5 over the 8 but it is
so well so strongly punched that it is now raised above the 8.
The other example available is the one offer by Tony Clayton on his website
First example offer for auction, that I know of, is by Baldwin's of St James, 15 April 2021; Lot 117
"A couple of edge nicks on obverse, otherwise about very fine.
Hammer price £3600.00; buyer's premium £864.00 = £4,464.00
The picture above is of the Baldwin's auction.