The exact age of this base is uncertain. It does look very old in general. There are some old stickers on the upper opening of the vase from a prior owner.
The only marking I see is on the bottom of the vase. It does not show up well in photos though the is looks like it may be the japanese characters for either right or left. There is general wear to the paint. There is a hairline crack to one side of the opening of the vase and a small chip at the point that it hits the edge. I don't see any other chips or cracks. It is quite dusty and has some dirt build up. Height is approximately 18 1/16 tall. Base is approximately 5 13/16 diameter. The opening at the top is approximately 6 9/16 diameter. Weight is 5lbs 12.4 oz.