This is the complete photo of a Standard Water Well Paste Jar which, in this example, was made by S. S. Stafford Inc, New York. This is essentially the same style as Jim Sinsley's photos with the exception it has a removable center water well and the patent date is newer (Feb. 20, 1906). The instructions indicate that the water well is to be kept half full, I'm speculating to keep the paste moist. Check the next photos for additional details. [id=250904109] [id=250904159] [id=250904198]