Worn by: Michael J. Fox as Marty McFly
Reference: Casio CA53W-1
Brand: Casio
The Casio Calculator Watch represents 1980s tech optimism in a film exploring future timelines, offering wrist-mounted computation when such integration felt revolutionary. Casio launched calculator watches in the 1970s-80s as bleeding-edge wearable technology, making the CA53W perfect for Marty McFly's time-traveling adventures through past, present, and future. The 8-digit calculator provides practical functionality for quick calculations, while the retro-futuristic aesthetic suited 1989 visions of 2015 technology. The watch has achieved cult status among fans, its humble digital functionality ironically more accurate to 2015 reality than the film's flying cars. The CA53W remains in production, cementing its status as accessible pop culture icon.

Source: https://iflwatches.com/blogs/celebrities/cinematic-timepieces-show-stopping-watches-in-movies