This meter popped up on Ebay about 9 years ago. It went $4200 - the seller (whose name I no longer remember) told me he picked it up at some garage sale for $25 and it had languished in his storage space; he said had it not drawn any bids, it would have been tossed! He was VERY pleased with the windfall realized from this meter.
All the old illustrations show this model WITHOUT the cover. For reference, here's what it looks like with it on.
mogul: The sour grapes bit is the understatement of the month...
If I remember correctly, it was listed from a ebay seller in Texas when it sold on Ebay. I got it in a trade from the guy whom purchased it off of ebay, i had it for several years before I ended up selling it to another serious watthour meter collector here in Ohio. I also have a very nice full page advertisement out of a electrical world magazine for it too..