Another outstanding coin indeed commems.
I've often wondered how Charles Barber
... known IMHO for his rather pedestrian designs of circulating coinage ... had the vision to create this spectacular obverse design ... Columbia sharing her call with the rising sun while a (naked mind you) cherub holds forth a cornucopia filled with the bounty of the new continent.
To your coin ... lovely.
Note that I have never seen an original surfaces Pan-Pacific half without the ring toning that appears on your coin ... as it appears as well on my PCGS
This is indeed a tough coin in the grade and eye-appeal you have posted ... very nice choice I say.
Take a look at my other hobby ... http://www.finewoodcrafter.com
Too many hobbies .... too much work .... not enough time.