Monster Zero x SciFi Japan - Archive Only

I am new to collecting godzilla and getting very interested in the originals and old pieces.

http://www.ebay.com/itm/251600243035

Can anyone shed light on the above item. I have been talking with the seller and he told me there were a few different editions released in 1966-1967. What are the different variations and are certain ones worth more then others?

Thanks all.

I found a seller in japan. Look at how amazing these are. May try for the middle one but he may want upwards of 1,000 for it. No damage at all and all the silver is still there. Beautiful example.