***Auction Highlight*** 1917 $1 Large Size Legal Tender Mule Signatures of Elliott & White, FR-38m Graded au58 EPQ By PMG. This 1917 $1 note is the last large-sized legal tender bank note ever issued. It's referred to as a "Horseblanket Note," due to their large size. The obverse features Washington and a vignette of Columbus sighting America. The reverse shows a "sawhorse" design. Add in the bright red seal and serial numbers and you've got a miniature work of art. A mule note is simply a Series of notes that uses back plates from a different Series. Mule notes can be produced by using back plates from a prior Series