Wayne Knight wears a Casio Data Bank

Jurassic Park (1993) gives its disaster a human cause: Dennis Nedry, the underpaid, overextended programmer played by Wayne Knight, who shuts down the park's security to smuggle dinosaur embryos out for a rival company and strands everyone with the fences down. Nedry is the film's small, venal villain, undone by his own greed and a Dilophosaurus before he can reach the docks.

His watch fits the character exactly: a Casio DBX-112, a digital Data Bank calculator watch with a multi-line display and on-wrist memory for phone numbers and notes, the gadget a tech-minded operator of the early 1990s would actually own. Watch-enthusiast discussion has long settled on the DBX-112 for the screen-worn piece, distinct from the Casio CA53W the character carries in Michael Crichton's source novel. With no costume credit to confirm it, the identification sits at Possible.