ProTek Series 3100 USMC Titanium Field

The Series 3100 is ProTek's officially licensed US Marine Corps version of its titanium field watch, with the USMC emblem on the screw-in titanium caseback. Like the Series 3000 it lights its dial with Swiss T100 tritium tubes, which glow on their own for years without needing light to charge them. The 40 mm titanium case has a fixed bezel and a titanium crown, is 11 mm thick and rated to 100 m, and the head weighs 48.4 g. Miyota's Super 2035 quartz runs it, with no date. It comes on an Italian leather strap from $550 or on a titanium bracelet, which is heavier and dearer, in black, blue or grey dials and a natural or black IP case. ProTek does not state the titanium grade.

Written 28 September 2026 from ProTek's Series 3100 page.