At first glance, we saw the same word that you did. But after we got a danged hold of ourselves, we researched and found "ASTHORE" is Irish Gaelic. it's a term of endearment meaning "treasure" or "loved one".
MATERIALS: 9k back and front, base metal interior, new 14k gold chain
AGE: c. 1880
CONDITION: Very good
SIZE: 1 1/8" length including the bale, 7/8" diameter