That's a hawthorn vase of my father's design. If it's from 1981, then it would have been made in the studio in Oroville By Scott Beyers and my father, Lee Hudin--probably just by him although they signed everything together. I haven't any clue as to the number on the bottom and it might have been added later or was used for a specific customer, although I really don't know given that it can't be piece #157 of that year as they made more than 157 pieces in a year.