It used to be thought that these groups were produced in chronological sequence, but this is now much less certain, although the Ballinagroun lunula does show Unaccomplished decoration replacing Classical when it was reworked. In one large sample of 39 lunulae, the 19 Classical averaged 54 grams, with the 12 Unaccomplished averaging 40 gm.
Historically, it was believed that these groups were created in a chronological sequence, but this notion is now less certain, as evidenced by the Ballinagroun lunula, which shows Unaccomplished decoration replacing Classical during reworking. Analysis of a large sample of 39 lunulae revealed that the 19 Classical specimens averaged 54 grams, while the 12 Unaccomplished specimens averaged 40 gm.