In this article I bring together some of the distinguishing features of some Crux variants of Æthelred II. Some of these variants are hard to distinguish, so I have created a flow diagram that groups the coins by features that are shared in common. The article focuses on Crux, Early Transitional Crux, Late Transitional Crux, Small Crux and Intermediate Small Cross-Crux mules. This guide should aid people in identifying some of these coins. The descriptions of each coin type is not exhaustive, and variations will likely crop up that don’t always fit into these neat categories, but the key distinguishing features have been listed.