½ AR Kahavanu - Raja Raja I

Raja Raja I's reign saw the Chola empire push deep into Sri Lanka, and it was almost certainly the absorption of Anuradhapura's mint traditions that influenced the kahavanu's weight standard. The full kahavanu aligned loosely with the Sri Lankan massa, and this half denomination was struck to facilitate trade across the Palk Strait at a moment when Chola naval power had made that crossing a Chola-controlled corridor.

Mitchiner 295–297 encompasses enough die variation that attribution of individual halves remains contested among specialists.