Seiko Speedmaster 7T59-7A00 1/100 second chronograph day-date quartz. Rare model. This is the world's first analog chronograph equipped with a 1/100 second stopwatch capable of 12-hour measurement, developed in the 1990s by Seiko. The dial features a 1/10 second counter at the 12 o'clock position, a 30-minute counter at the 6 o'clock position, and a hacking (seconds hand stop) function. The movement of each hand at the start of measurement is a sight to behold. Accuracy and Size: Accuracy is not an issue as it is quartz. Lug width: 12mm. Case diameter: approximately 39mm (excluding the crown), Length (lug to lug): approximately 43mm Thickness: approximately 10mm (including the crystal) Accessories: None Battery replaced on 2025.10.5 Each function and condition are good. USED, so no returns or exchanges are accepted.