Picked up this battery jar at a bottle club meeting this past Wednesday. I've never seen one like this before, but was quite impressed with the Whitall Tatum logo. The base is also embossed W T & CO..... I'm adding this information after returning from the Keene, NH bottle show. This in fact, is not a battery jar although it is exactly the same size and shape. This particular jar is a liner for what appears to be an early version of a thermos bottle. I have a complete unit now and it all makes sense. I will post another picture if just one person seems interested enough to request it.