Seiko Prospex is a line of high-quality sports watches produced by the Japanese watch company Seiko. The name "Prospex" stands for "Professional Specifications," and the watches in this line are designed for sports, diving, and other outdoor activities. Seiko Prospex watches are known for their durability, reliability, and functionality, and they often incorporate advanced features such as water resistance, high visibility in low light conditions, and in some models, even GPS and radio signal synchronization for precise timekeeping.

The Prospex line includes various series, such as the Seiko Prospex Diver's, Seiko Prospex Land, and Seiko Prospex Sky, each tailored to specific outdoor activities. Many of these watches are popular among divers and adventure enthusiasts due to their robust construction and specialized features.

Seiko has a long history of watchmaking and is renowned for its craftsmanship and innovation. The Prospex line continues this tradition by offering timepieces that meet the demands of professional and recreational adventurers alike.