Dr. Josef Sadler

Birth record: HBMa KOSTELNÍ BŘÍZA (o. Sokolov) 880 N 1784-1867 (i) O 1784-1861 (i) Z 1784-1868 (i) Folio 13, image 15 (out of 72)
https://www.geni.com/documents/view?doc_id=6000000141881557233
https://vademecum.nacr.cz/vademecum/permalink?xid=adc52e31-799d-479...

Death record: https://www.geni.com/documents/view?doc_id=6000000141881557236
: https://vademecum.nacr.cz/vademecum/permalink?xid=cfdfdab6-a29e-45c...
HROZNĚTÍN (o. Karlovy Vary), book 540, Z 1839-1937 (i), 1943, 1948, folio 96, reproduction 100 (out of 142)

Grave https://www.findagrave.com/memorial/197083161/josef-sadler
is in Hroznetin Jewish Cemetery and it says "Doctor Josef Sadler born 30 January 1816 in Arnetzgrun (Arnoltov, Březová), died 3 September 1893 in Schlachenwerth (Ostrov)"

It is very likely, that the birth day and birth month are not correct on the gravestone. Most likely, he was born 5 July 1816 as it says on his birth record. That is consistent with the death record, where it used to say he was 77 1/2 years old and then it is corrected to show he died at the age of 77 years.

Search in Google Book for 'Königreichs Böhmen "sadler jos" OR "sadler josef"' namely, https://www.google.com/search?tbm=bks&hl=en&q=K%C3%B6nigreichs+B%C3... gives only one doctor Jos Sadler, always in Kinsberg (Hroznetin) in the years: 1845, 1847, 1859, 1862, 1877