That's pretty cool. I do love the old postal paraphernalia. I've considered collecting it. In fact I almost bought an old postal scale at an antique store last week, but if I bring any more stuff into my studio, my wife will have my head. Mounted!
Edit - Don't know if you saw his other items, I_Love_Stamps, but he also has an antique Ohio postal hand cancel. A good find for a collector in some place like, Ohio.
http://cgi.ebay.com/vintage-Postal-...em3a665cbc15