HK-410B, Kentucky State Fund Dollar from the 1915 Panama-Pacific International Exposition in San Francisco, struck as a fob with included bail. These were typically sold for use as a watch fob, although I have seen similar types also mounted on a ribbon.  The design type also catalogued in Jeff Shevlin's new book on West Coast Expositions as SH 18-16.  "King" of the 20th Century So Called Dollars, unlisted in the first edition. Perhaps less than 50 unlooped specimens existing in all grades, most damaged (Shevlin estimates this as an R-7, with 20 or fewer known).  Oddly enough, the fob version is likely even scarcer!  Extremely Fine and original, the surfaces a bit grubby and lightly scuffed from random, non-numismatic storage. NGC will certify this with attached loop, and the surfaces should not be a problem.  I know of at least one such currently certified, although it is not listed in the Census as it was Net graded I believe. Another worn example in the VF range, with initials engraved in the field, brought $274 on ebay, June 2019 - that was cheap considering, mainly because I forgot to bid on it!! Basically, considering that the total NGC Pop of non-looped pieces is FIVE after 20 years, this may be about the only way you can get an original, relatively problem free example. Once sold, unlikely to be replaceable any time soon ...