Fr 2E25R.2??? 25¢ Second Issue Experimental Fractional Reverse

Unlisted 2E5R.2??? 25 cent second issue experimental fiber paper note exhibits a #222 Valentine number on the reverse. This note is a unique combination of a R7 (4-12 known to exist) experimental 2E5R.2 that is backed with a very thick partial experimental 2E25R.2??? note, with only a single hole punch cancel, with what appears to be a “Specimen” stamp.  There is a partial stamp visible through what should be the second punch cancel. Minor staining