Old Chinese vase - at a total loss to identify

by Dael
(Orillia, ON)

I would like help in identifying this old Chinese vase that was once a lamp, if you please. Two friends who collect old Chinese vases do not recognise the style. No one noticed, however, the old markings on the bottom, some of which were obliterated when the hole was drilled to convert the vase to a lamp. My camera was unable to pick up the markings clearly so I also sketched what I could make out.
All help appreciated.
Thank you.
Cheers, Dael