A. Lange & Sohne 1815 Walter Lange Up and Down 1815 BrandA. Lange & Sohne Collection1815 Model1815 Walter Lange Up and Down Reference223.032 Country of originGermany Type of watchmen’s Case diameter37.5 mm Power reserve45 hours Water resistance30 m Limited to50 pieces Limited editionHoursMinutesSecondsPower reserve indicatorWristwatch