I suggest you get it appraised by an expert.
See if you can get in touch with a typewriter restorer or collector.
I doubt the average antique store dealer will know anything on the matter.
The diameter of a period on a typewriter is 3 mm.
The typewriter was invented various times in the Victorian period and the 20 th century. It was first invented by Henry Mill, in 1868.
The change from "brod" to "brot" in German occurred in the late Middle High German period, around the 14th century. This shift in spelling reflects changes in phonetics and pronunciation over time.
In English is March Revolution and in German is Vormärz (pre-march period)
The first typewriter was invented by Christopher Latham Sholes, Carlos Glidden, and Samuel W. Soule in 1868. Their invention led to the creation of the first commercially successful typewriter, the Sholes and Glidden typewriter, which eventually paved the way for modern keyboards and typing machines.
In the period from about 1700-1914 the most important reason was lack of prospects in the German states.
German idealism
The history of the language begins with the High German consonant shift during the migration period, separating Old High German dialects from Old Saxon.
Humanism and the Reformation were two distinctive experiences of the renaissance period.
Before the Third Reich, and before the Weimar period, Germany was ruled by Monarchs known as German Emperors. Wilhelm II was the last German Monarch who was abdicated and put into exile. Once the Monarchy was abolished, the Weimar period began and the leaders were then known as Chancellors.
Generally around when your period should be
It became standard practice with the invention of the typewriter. The computer keyboarding practice of one space after a period has become acceptable.