Donor told us these were vintage  (or possibly antique) candlesticks, imprinted with a gold Belleek mark.

While we have no idea what they are worth, we did see a similar pair on e-bay with a $30 opening price.  E-bay seller described  them as  Belleek-in-retrospect collection.  However, although they had a similar pattern, they were shorter, fatter, and had a more modern green mark, than the 6 and 1/2" pair being offerred.