Exceedingly rare 23J Type II sixty-hour Bunn Special. Circa 1931. The 163 Type II is the “Holy Grail” of the Illinois prestigious grade 161 and 163 variants. 10 other examples of the 163 Type II are confirmed in collector’s data but they rarely surface for sale. This watch is exceptional and possibly the best example in existence. So rare it is not listed in Gilbert’s book. 10K gold filled case.