Medical mercury thermometer and corresponding velvet-lined protective cardboard box. Manufactured in Germany before 1920. Hand-painted numerals to be read when held in vertical position. Length of glass tube: 126 mm.
<a href="//commons.wikimedia.org/wiki/User:Franz_van_Duns" title="User:Franz van Duns">Franz van Duns</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>