The comments on that second article links to a bit of detective work on bikeforums claiming H Plus Son are made by a factory owned by Giant and are the same 42mm rims on the Giant Bowery 1984.
*tarkbike.com user tzusing (is the Son in H+Son) says:
"My company's background is def more in raw material and production techniques...(meaning i come from a background of all those factories that make bicycle parts for brand names)"
"HKfixed is indeed selling my rims. But ordering from me is direct from the Kun Shan factory in China. (1 hour west of shanghai) and not Hong Kong."
The comments on that second article links to a bit of detective work on bikeforums claiming H Plus Son are made by a factory owned by Giant and are the same 42mm rims on the Giant Bowery 1984.