No photo of the base but I'll try to get one.
Can we tell something about the age by the only picture provided?
This looks more like a qingbai or yingqing glaze than celadon. Whether such a ribbed shape did exist I do not know, but I have doubts, primarily because of the production methods used in the old times.
However, the main point I want to make is that this deviates from a traditional Chinese shape. Do an image search for Yuhu Chunping or ????. The neck is more narrow, the mouth less wide. IF it is Chinese, then there is a good chance that it is 20th century.
PS: I put an explanation of the Chinese terms qingbai and yingqing in the Water Cooler board of this forum.