The term chain in this case usually refers to the measuring instrument rather than a unit of length; the distances measured with such an instrument are normally measured in feet (and usually decimal fractions of a foot, not inches).
Messages: 7,549. Likes Received: 4,600. For the record, Disney did try to sell lifetime passes at the Magic Kingdom the first year it was open (1971) called a Gold Pass for $100. This pass was said to be good for a lifetime and for any additional parks that they may add in the future.
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