Williams Class A Type 1. This example shows two fine Urnes "dragon worms", or "ribbon animals", symmetrically crossing, their necks disappearing into the mount and their tails reappearing folded over the top of the mount. Note the lower lip lappets.
Some would also see a bulbous-nosed Loki mask in the design.
Williams, D. 1997. Late Saxon Stirrup-Strap Mounts. CBA Research Report III. Council for British Archaeology: York.