Class 3bc is a transitional class, and various sub-types can be recognised. Davis defined coins of this class as having busts similar to class 3b, but with a slightly smaller bust, traces of necklines and with ENR ligated. In Churchill and Thomas's grouping of 3bc they have included coins with even smaller 3b style busts and with clear neck lines, and in some cases there are no pellets in the inner circle between the neck lines. These coins often have only the NR ligated rather than ENR.

Most 3bc coins have initial mark type 4, i.e. stubby rounded ends to the 6 "rays", however some have initial mark type 3 with sharper ended rays.

Churchill and Thomas include 3b style coins with initial mark type 4 in class 3bc.

Finally, mention should be made of scarce 3bc style coins which have 8-rayed initial marks instead of 6 rays.

3bc was minted not only at London and Canterbury (examples below) but also at Bury, Bristol, Carlisle (rare), Ilchester, Lincoln (rare), Northampton,  Norwich, Oxford, Shrewsbury, Wilton,  Winchester, and York.