The Birth Date is a rough estimate. See the text for details.
Biography
Birth date is a guess based on his children's births in the early 1870s
Sources
"New York, New York City Marriage Records, 1829-1940," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:244Q-5JV : 20 March 2015), Wilhelm Perschke in entry for Conrad Perschke and Anna Dorothea Bremer, 21 Jun 1903; citing Marriage, Bronx, New York, New York, United States, New York City Municipal Archives, New York; FHL microfilm 1,939,904.
"New York, New York City Marriage Records, 1829-1940," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:24C3-LRL : 20 March 2015), Wilhelm Perschke in entry for John Winkelmann and Selma Perschke, 14 May 1893; citing Marriage, Manhattan, New York, New York, United States, New York City Municipal Archives, New York; FHL microfilm 1,452,479.
part of the marriage document from Wilhelm Beckmann and Christine Beckmann (geb. Winkelmann) - my grand parents - and part of the German "Ahnenpass" of Gertrud Brokmeier (geb. Beckmann) my mother
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