According to an article in The Vermont Philatelist, there are about 4 examples of this wonderful oval known. The name of the town is in italic letters which is quite unusual. South Strafford is still post office in Orange County. Another nice item for my oval collection.
I have a small collection of postmarks showing the VERMONT completely spelled out. And the killer is a nice little fancy cancel also. This example from North Tunbridge, another post office in Orange County, is unusually fancy for such a small town. North Tunbridge existed as a post office from 1853 to 1911.