The existence of a doubled reverse die has been known for years, and the combination of the doubled obverse and reverse combination is well documented.  We can verify these from our own inventory and we believe others as we move forward.  But unlike the Double Die Obverse coins, there is no standard by which to judge the coins.  The "Cherrypicker's Guide" did not designate a variety as a major rather than minor.  As a result we can only document all the varieties we can find and assume all Third Party Graders would consider them minor varieties until one is determined to be a major variety.