Abbreviated markings that identify the test year of arms at the B.N.P.* (National Proof House) in Gardone Val Trompia, Brescia, Italy

Prior to 1954, the test year was indicated with Arabic numerals.

Mark	Year		Mark	Year		Mark	Year
X	1954		AL	1983		CI	2012
XI	1955		AM	1984		CL	2013
XII	1956		AN	1985		CM	2014
XIII	1957		AP	1986		CN	2015
XIV	1958		AS	1987		CP	2016
XV	1959		AT	1988		CS	2017
XVI	1960		AU	1989		CT	2018
XVIII	1961		AZ	1990		CU	2019
XVIII	1962		BA	1991			2020
XIX	1963		BB	1992			2021
XX	1964		BC	1993			2022
XXI	1965		BD	1994			2023
XXIII	1966		BF	1995			2024
XXIII	1967		BH	1996			2025
XXIV	1968		BI	1997			2026
XXVI	1969		BL	1998			2027
XXVI	1970		BM	1999			2028
XX7	1971		BN	2000			2029
XX8	1972		BP	2001			2030
XX9	1973		BS	2002			2031
XXX	1974		BT	2003			2032
AA	1975		BU	2004			2033
AB	1976		BZ	2005			2034
AC	1977		CA	2006			2035
AD	1978		CB	2007			2036
AE	1979		CC	2008			2037
AF	1980		CD	2009			2038
AH	1981		CF	2010			2039
AI	1982		CH	2011			2040

 

* Banco Nazionale di Prova per le Armi da Fuoco Portatili e le munizioni commerciali