Tudor Black Bay 58 GMT Bracelet 39mm 7939G1A0NRUOverview Tudor's Black Bay GMT had run at 41mm since 2018. The 7939G1A0NRU moved that function into the 39mm Black Bay 58 case in 2024 a correction for buyers who wanted the complication but found the larger format too much wrist for daily use. The 39mm case changes nothing about how the GMT works. It changes who the watch fits. The case is 39mm stainless steel with the BB58's domed bezel and short lug geometry, on the rivet style stainless bracelet.
Shopping security
Each payment you make on thelockerguy is secured with strict SSL encryption and PCI DSS data protection protocols