William I (1066-1087), Penny, Profile Left type [BMC I], possibly Steyning, Deorman, [––] rma on st [––], 0.52g/7h (N 839; S 1250). Fine, reverse better, rare £40-£50

Allen 2022 list Deorman as a moneyer at Steyning in types 2, 4, 5, 6 and 8. The current coin is potentially a new type for the moneyer at this mint.