On August 8, 2001 I took a trip to Sheboygan which is the county seat of Sheboygan county (Sheboygan county recorder 508 New York Ave., Sheboygan, WI  920-459-3023) and searched the vital records for Koberstein entries.  It seemed logical that there may be entries because the 1920 U.S. Federal Cencus lists the Carl and Hanna family at 315 Wisconsin Avenue, Sheboygan, WI.  However I was disappointed to not find any entries.  Therefore I have to conclude that even though the Carl and Hanna family lived there, no vital events (birth, marriage, or death) occurred there.

I searched:

Death records from 20 AUG 1833 through 23 JUL 2001

Marriage records from 2 Feb 1849 through 14 JUL 2001 (groom only); Bride indexes for 1973- 1992 and 1993-2001.

Birth records from 23 DEC 1833 through 5 JUL 2001 (an interesting surname of Krieglestein was found).  Just to be sure I double checked the 1900-1920 records which is probable birth years for Carl and Hanna's children.