The Hawaiiana Numismatist ™

HSNA 2M-199 = Reverse 2M-189 + Obverse 2MB-189 Strike + Obverse 2MB-154 Strike

I recreated the dual counterstamp on a uniface sand dala (2M-199) with an overlay of a 2MB-189 obverse and an overlay 2MB-154 obverse.  All three coins are in my collection.