I have taken the death date 11.12.1812 from the following entry in Familysearch:
https://www.familysearch.org/ark:/61903/1:1:QPDW-3W2D
The original church record of Lichtenau, Baden attached shows as life time 65 years, 9 months, 17 days which leads to a birth date of 23.2.1747.
