- Ref: 5625-7000 - Serial/Year: 010344/Jan 1970 - Case: 37mm diameter, 19mm lug width, 10mm thickness. Stainless Steel -Caliber: 5625 -Power Reserve: Unknown - Frequency: 28,8000 bph -Crystal: Sapphire -Accuracy: -10/+10 Seconds per Year Our measured specs: -35 sec/day -Band: Black leather band -Water Resistant: Unknown - Condition: Very Good condition. Moderate scratches on the case/crystal. Quickset date works. -Warranty:90 days - Made in Japan