I am the source of these chips and I believed that they were from Hawaii. However see the story below from their web site:

Pacific Brokerage Co., Inc., was established in November of 1928 by Frank M. Manson and James W. Manson. The office is currently being operated by James F. Manson President and James B. Manson Vice President third and fourth generation Custom House Brokers. For over 70 years, Pacific Brokerage Co., Inc. has been serving the needs of importers and exporters through the Port of Nogales, providing the best personal service to our clientele.

I would not call this absolute proof but it is a lot better attribution than some stories I have heard. BTW Nogales is in Arizona. Thanks Gene.