Antique Leyser Leipzig medical thermometer, circa 1880, wooden case

Antique medical thermometer from Leyser, a historic manufacturer of scientific and medical instruments in Leipzig, Germany, dating from the late 19th century, circa 1880.
This model corresponds to the clinical thermometers used according to the methods of Dr. Carl Reinhold August Wunderlich, a pioneer in the systematic measurement of body temperature and the originator of the 37°C standard.
Authentic collector's item, consisting of:
Glass tube with graduation scale
Mercury
Brass tip and ring
Original wooden protective case, in two parts
Markings visible on the thermometer:
“M. Leyser, Insp. a.d. Univ. Leipzig,” guaranteeing that it was manufactured for university or clinical use.
Condition
Good overall condition for an antique object over 140 years old.
Glass intact, no cracks
Graduation legible
Normal signs of wear and patina on the wooden case
Case functional, with marks consistent with its age
Item not tested, sold as a collector's item.
Please examine the photos carefully, as they are an integral part of the description.
Characteristics
Manufacturer: Leyser
Origin: Leipzig, Germany
Date: circa 1880
Materials: glass, mercury, brass, wood
Total length with case: 22 cm
Weight: 35 g
Type: antique medical thermometer / scientific instrument
Period: 19th century
Collector of antique medical instruments
Cabinet of curiosities
Medical or scientific decoration
Museum, display case, or historical reenactment