Patent Model - Improvement in Watch-Keys

Maker and role
Henry Lohmeyer, Patentee
Production date
Mar 30 1875
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Object detail

1" (2.5cm)
In his patent, Lohmeyer describes the advantages of his improvements in the following: "In all watches that I am aware of that use a removable watch-key secured in the pendants, when the removable key is withdrawn for use, almost a direct opening is left through the pendant to the interior of the watch, thereby endangering the contained movements by the admission of dirt, &c., whereas in mine there is no opening through the pendant or push-rod to the interior of the watch at all, because the end is closed..." (Patent Number 161,421)
Object number
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