Longines Ultra Chron Cal 431 Ghost Dial Nylon Dial: Original gloss black dial

Dial: Original gloss black dial with white gold surrounds

6694 was one of Rolex’s longest-running references

ensuring accurate timekeeping and reliability

This 1973 Rolex Datejust 1601 features the highly sought-after glossy ghost dial

Longines Ultra Chron Cal 431 Ghost Dial Nylon Dial: Original gloss black dialThe Longines Ultra Chron, powered by the Caliber 431, was introduced in 1968 as a high performance, precision focused chronometer designed to push the boundaries of timekeeping accuracy. The Caliber 431 was a groundbreaking movement, boasting a high frequency of 36,000 vibrations per hour (vph), which was significantly faster than most other mechanical movements of its time, allowing for improved accuracy. The Ultra Chron was marketed as the "world's