Here is a link to a video showing the thread pitch gauge and how it works.....
http://www.youtube.com/watch?v=Gdvtw0pTAOs
I won't bother linking to where to buy. Just Google "thread pitch gauge" or something close to that and you'll find tons of them. Prices ranging from a $7 unit from Sears/Craftsman up to $50+ units from Mitituyo and Starett etc... It really is quite the handy tool if you do much of this kind of work oldtoolsniper. Hope this helps....any more info needed just ask.
As for the label measurements I can provide them for you when it arrives if you want them. JonB needs to get it shipped to it's excited new owner.