You have me confused.
First, none of the auctions were for just a 168.015 case. Both auctions are for the same watch, so obviously there's some funny business going on there.
This case is one of very few Omegas have have the reference number engraved on the outside of the case.
The cal. 564 movements in the eBay listings have serial numbers in the 30M+ range, clearly outside the range of the period where these watches were sold. They should be in the 27M to 28M range. Made around 1968 and sold up to 1970 or so.
I have an example with the pie-pan dial:
Hope this helps,
gatorcpa
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