Was probably made during the 70`s when owl collecting was popular. But there were so many on the market and most were imported, that prices never appreciated much then or since that time !! There are still so many available and are not hard to find at all, so selling is just "what ever you can get"
for the unmarked pieces. $10. would be good for that piece !! Like someone said on the other piece,, I would stick with the known,,marked pieces first then work backward to the common inexpensive pieces. You will save a lot of time !!