HK-350, U. S. Navy World Voyage, a souvenir of the visit of the 'White Fleet' to San Diego, soon to be a critical Navy base on the Pacific.  All of this issue was originally issued mounted on a badge with a clasp at the top; two complete badges may currently be seen (Feb. 2024) ebay, one in my own listings.  Stupidly enough, even though this fact is known (or should be) by the 'experts' at NGC and PCGS, neither will apparently certify one of these with the clasp removed, but will with the clasp attached, such as the NGC XF-45 copy I also have listed.  PCGS let one through in the past certified at MS-63, so I thought I would take a shot as the example shown here is a no-doubt Gem Unc.  No joy, as it came back in the Details holder as shown, in which it still remains (images of the piece in its raw state are shown as they show the surfaces better). Nice original Copper surfaces with few if any disturbances and a sense of being Prooflike in the fields.  Other than on an original undisturbed badge, of which few remain, you are unlikely to find a nicer copy.  Oh well - my loss is your opportunity.  Make an Offer option added if anyone has a serious disagreement with my estimate of value.