‚ÄčThe Long Cross Pennies of Henry III 

Class 2a

Mintmark type 2: 5 or 6 rays to the star, with rays being of uneven width/length.

X1 - Curved limbs

Coins with No Sceptre

Class 2

The mintmark is used to distinguish class 2a from 2b, and the shape of the letter X subdivides class 2b into 2b1 and 2b2

Class 2b1

Mintmark #3, more regular appearance compared to type 2. It usually, but not always, has two limbs spread either side of the central crown ornament. 

X1 - Curved limbs

Class 2b2

Mintmark #3

X type 2 (Plain/straight limbs)