1922 $1 Canada British Columbia Gold / Greene-796 PCGS AU POP1 R8

This is the only specimen graded by ALL grading companies in ALL grades. 
NGC=0, ICG=0, ANACS=0 & PCGS=1. Gold Shield PCGS certified.
Manitoba Gold with buffalo on the reverse.
10 stars, Indian Head & date of 1922 on the obverse. 
AU detail due to being removed from an old-time jewelry mount on the reverse as shown in the PCGS photo. Just what would the only one certified be worth?!? Priced at a bargain. Own the only one certified – this one.