Today, almost all SCUBA products are an amalgamation of materials and labor from places all around the world. The potentially misleading "Made in ..." statements often only indicate the country of final assembly or sometimes just where it was packaged.
As a result of globalized supply chains and industrial clustering, very little diving equipment is entirely made in the United States. Consider something as ordinary as a rubber regulator hose: The raw hose stock itself is manufactured in Ohio with "Made in the USA" proudly imprinted along the length of the hose, but the rubber jacket on the hose came from the Southeast-Asia region and the thermoplastic liner came from the Asia-Pacific region. The chromed brass fittings and oxygen compatible O-rings were manufactured in mainland China. The coil of raw hose was exported to Taiwan, where it was cut to length and the fittings were swaged on and then the finished hose exported to Italy. The hose was then assembled with a SCUBA regulator containing a variety of parts from all over Europe, where the product also received quality control testing and packaging. The finished regulator package is finally exported to a California warehouse to later be sold on to divers under the famous brand of a publicly owned multi-national outdoor products company. Yet, holding the regulator in your hand all you might see is a brand logo on the stages and "Made in the USA" on the hose.