Import Code HOX Calibers

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The Henri Stern Watch Agency, Inc. (HSWA) used code HOX to import Patek Philippe and Universal Genève watches into the US. Henri Stern, a Patek family member, established the New York agency in 1935 and became exclusive US distributor for Patek Philippe (formalized 1945) and Universal Genève (from 1941, including thousands of chronographs supplied to the US armed services during WWII). Stern ran the agency until 1958 when he returned to Geneva as Patek Chairman. IWC is also listed under HOX in some sources, though IWC movements cased by Henry Blank & Co. (Newark) bear the separate HXB code.

Early adopter: HOX predates the formal US–Switzerland trade agreement of May 1, 1936, which mandated import codes for all Swiss watch movements entering the United States.

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Manufacturer Movement
IWC 41 IWC 41
IWC Manual 12.97 mm x 17.48 mm
IWC 44 IWC 44
IWC Automatic 17.48 mm
IWC 60 IWC 60
IWC Manual 22.56 mm
IWC 88 IWC 88
IWC Manual 27.07 mm
IWC 89 IWC 89
IWC Manual 27.07 mm
IWC 91 IWC 91
IWC Manual 16.92 mm
IWC 96 IWC 96
IWC Manual 19.74 mm
IWC 150 IWC 150
IWC Electromechanical 29.4 mm
IWC 401 IWC 401
IWC Manual 22.56 mm
IWC 402 IWC 402
IWC Manual 23.69 mm
IWC 403 IWC 403
IWC Manual 23.69 mm
IWC 422 IWC 422
IWC Manual 23.69 mm
IWC 431 IWC 431
IWC Manual 11.84 mm x 15.23 mm
IWC 432 IWC 432
IWC Manual 11.84 mm x 15.23 mm
IWC 630
IWC Manual 23.69 mm
IWC 852 IWC 852
IWC Automatic 29.33 mm
IWC 853 IWC 853
IWC Automatic 29.33 mm
IWC 854 IWC 854
IWC Automatic 28.2 mm
IWC 916
IWC Automatic 30.45 mm
IWC 917
IWC Automatic 30.45 mm
IWC 918
IWC Automatic 30.45 mm
IWC 964
IWC Automatic —
IWC 982 IWC 982
IWC Manual 37.79 mm
IWC 2210
IWC Quartz —
IWC 2250
IWC Quartz —
IWC 3755
IWC Automatic —
IWC 5000
IWC Automatic —
IWC 5011
IWC Automatic —
IWC 7922
IWC Automatic —
IWC 8521
IWC Automatic 29.33 mm