Kieninger Date Codes (post Howard Miller)

Before 1985, Kieninger used a 2 digit number for the year of manufacture: 79 meant 1979. In 1985 the date changed to a new 2 digit system:

01. 1985
02. 1986
03. 1987
04. 1988
05. 1989
06. 1990
07. 1991
08. 1992
09. 1993
10. 1994
11. 1995

Kieninger Date Codes (Post Howard Miller 1995): The date code is encrypted in the serial number:

As an example, 1315xxxxxxxx