This vintage Tudor Oysterdate Chronograph “Big Block” ref. 79160 is an iconic sports chronograph introduced in the 1980s and renowned for its robust, distinctive case design. It features a substantial 40 mm stainless steel case, giving the watch its characteristic “Big Block” nickname. The black dial is complemented by contrasting chronograph registers, luminous hour markers and hands, and a date display at 3 o’clock. The watch is powered by an automatic chronograph movement based on the Valjoux 7750, modified and regulated by Tudor. Presented with its original box but without papers, this highly collectible reference represents an important chapter in Tudor’s vintage chronograph history.