Actor Eiza González spotted wearing a Casio

Michael Bay's 2022 action film Ambulance is not subtle about anything — and the watch on Eiza González's wrist is no exception. As trauma nurse Cam Thompson, González wears the Casio G-Shock G-SQUAD GBD-100-1, a black resin sports watch that reads immediately as functional, credible gear for a medical professional operating under extreme pressure. It is a deliberate costume choice that communicates character without a single line of dialogue.

The GBD-100-1 sits within Casio's G-SQUAD sub-line, which targets fitness and active-lifestyle users who still demand core G-Shock durability. The case measures 49.3 mm in diameter but wears lighter than its dimensions suggest thanks to the resin construction. It carries Casio's Module 3454, offering Bluetooth connectivity to the dedicated G-Shock Move app, a pedometer, calorie counter, and move reminder — functionality that aligns squarely with a healthcare worker's physical demands. The watch is ISO 200-meter water resistant and maintains G-Shock's foundational Triple 10 construction philosophy: 10-meter drop resistance, 10-bar water resistance, and a 10-year battery life target, though the GBD-100 runs on a CR2016 with a more modest real-world lifespan of roughly two years under Bluetooth use.

From a collector standpoint, the GBD-100-1 occupies the utilitarian end of the G-Shock spectrum. It is not a grail piece — there are no limited runs, no collaboration colorways in this reference, and no secondary-market premium. What it represents instead is G-Shock's core democratic promise: serious engineering at a mass-market price. That credibility, built over four decades and battlefield deployments worldwide, is precisely what makes it a convincing prop in a film where authenticity of detail matters.

Eiza González has been building a formidable Hollywood profile through action-heavy roles, and Ambulance — shot guerrilla-style across Los Angeles with drone cinematography — demanded physical performance from its cast. A G-SQUAD on her wrist reinforces the character's grounded, no-frills competence.

At roughly $79 retail, the GBD-100-1 trades at or near list on the secondary market. There is no grey-market premium to speak of. Its value is purely functional — which, in this context, is the entire point.