Worn by: Tessa Thompson as Agent M
Reference: Hamilton Ventura
Brand: Hamilton
Agent M wears the iconic Hamilton Ventura Quartz as part of the Men in Black uniform in the franchise's fourth installment. The distinctive shield-shaped watch continues its role as an essential part of the MIB aesthetic, maintaining over 60 years of rebellious appeal since its groundbreaking 1957 launch as the world's first electrical, battery-powered watch.

Source: https://www.hamiltonwatch.com/en-us/h24411732-ventura-quartz.html