Unusual looking experimental image orthicon shaped camera tube on Ebay!

[Aussie Bloke]

G'day all. Just been browsing Ebay for camera tubes and have found a very rare unusual looking experimental camera tube that looks like an image orthicon tube in shape but totally different in structure. Here is the link to the auction:
http://www.ebay.com/itm/270962696901

Does anyone know what this camera tube actually is and it's application and if it was an experimental prototype or production type for special application???

Anyways happy bidding for those interested in buying this tube.

Cheers
Troy