The watch you are referring to is the Heuer Carrera Reference 110.573, a highly collectible vintage automatic chronograph produced by Heuer in the mid-1970s (circa 1974–1975).

While listing descriptions sometimes mix terminology like "Black Dial," this specific reference variant is famously known in the collecting community as the "Tiger's Eye" or "Fumé" Carrera (Ref. 110.573F) due to its stunning, smoky brown-to-gold gradient dial that mimics the chatoyancy of a tiger's eye gemstone.

• The Case: It features a 39mm barrel-shaped (or cushion/C-shape) stainless steel case with a sunburst/soleil brushed finish. This silhouette represents Jack Heuer's dramatic design shift during the 1970s to match contemporary tastes for larger, chunkier sports watches. 

• The Dial: The 110.573F variant stands out with a dark smoky gradient "Fumé" or brown dial, highlighted by dual dark grey sub-registers, an inner tachymeter bezel, a date window at 6 o'clock, and vibrant orange chronograph hands that give it a quintessential retro motorsport aesthetic. 

• The Movement: It is powered by the legendary Calibre 12 automatic chronograph movement. Developed in partnership with Buren, Breitling, and Hamilton, this movement is famous for its unique architecture: the winding crown sits on the left side (at 9 o'clock), while the traditional chronograph pushers remain on the right side.

• Collectibility: These watches were produced right before the quartz crisis fully took hold, meaning production runs were relatively short. Today, a well-preserved Tiger's Eye Calibre 12 is highly prized for its mechanical historical importance and unmistakable 1970s swagger.