There were two types of Zodiac Oath Contracts: the virtual one and the physical one.
The virtual Zodiac Oath Contracts were more common, and as long as someone had at least a 2-star star privilege, they could buy it directly from the star network, and each cost 100 million ZC.
As for the physical Zodiac Oath Contracts, they were rare because only Champion Shops could produce them, and their prices were also higher than the virtual ones, 150 million ZC each. But their effects were the same nonetheless.
After his encounter with Nelsen, Jacob brought five virtual and three physical Zodiac Oath Contracts for himself.
Now that Jacob has plundered Captain Free Sword's everything, his advanced unique rank star watch wasn't an exception, and he claimed it for himself as it was more advanced than the epic one.