Very nice early key I suspect early 1800s but it may even date to the 1700s. It is solid brass and very large! Early Skeleton keys are getting very collectible! Interestingly there is a makers mark on the stem of the key which appears to be an impressed Y. Marks I have seen on similar keys are considered very early! I suspect this is a very rare key! Well worth the investment! I found it with a selection of other keys so check out my other listings! See the photos for more details!