1990: Historical dating note
MADE IN U.S.A. is reported from October 1990.
Historical and technical guide
1932 and 1941 Replica styles, collectible stamps and cautions about modern manufacturing dates.
All illustrated examples and dated claims link back to their original documented references and named sources. Transitional dates are approximate unless explicitly supported.
MADE IN U.S.A. is reported from October 1990.
“Made in USA” is added to the bottom stamp.

Case / bottom stamp · 1982

Case / bottom stamp · 1982

Case / bottom stamp · 1985

Case / bottom stamp · 1988

Case / bottom stamp · 1988–1992

Case / bottom stamp · 1989

Insert reference · 1990

Case / bottom stamp · 1990

Case / bottom stamp · 1991

Case / bottom stamp · 1992

Case / bottom stamp · 1993

Case / bottom stamp · 1994

Case / bottom stamp · 1997

Insert reference · 1997

Case / bottom stamp · 1997

Case / bottom stamp · 1997

Case / bottom stamp · 1997

Case / bottom stamp · 1998

Case / bottom stamp · 1998–1999

Case / bottom stamp · 1998–2001

Case / bottom stamp · 1999

Case / bottom stamp · 1999

Case / bottom stamp · 1999

Case / bottom stamp · 2001

Case / bottom stamp · 2002

Case / bottom stamp · 2002

Case / bottom stamp · 2002

Case / bottom stamp · 2002

Case / bottom stamp · 2002

Case / bottom stamp · 2003

Case / bottom stamp · 2004

Case / bottom stamp · 2004

Case / bottom stamp · 2005

Case / bottom stamp · 2006

Case / bottom stamp · 2007

Case / bottom stamp · 2007
Additional matches are available in the full archive.