SN Graphic

A live-data recreation of the "SN Graphic" reference chart: every documented Example's decoded Barrel Proof Date on the left, and every Prefix's US Import Date on the right, one row per month. Computed from the registry's own data, so the range below grows as more Examples and Prefixes are documented. Click a tile to open its Prefix page.

US Import	17.1	17.2	17L.1	17L.2	18.1	19.1	19.2
Non-US Import	17.1	17.2	17L.1	17L.2	18.1	19.1	19.2

	Barrel Proof Date →	Date	← US Import Date
1983	AB	Nov 1983
1983	AA AB	Dec 1983
1984		Jan 1984
	AB	Feb 1984
	AB AC AD	Mar 1984
		Apr 1984
		May 1984
	AE	Jun 1984
	AF	Jul 1984
		Aug 1984
	AG	Sep 1984
	AA	Oct 1984
		Nov 1984
	AG	Dec 1984
1985		Jan 1985
		Feb 1985
		Mar 1985
	AH AK AL	Apr 1985
	AM	May 1985
		Jun 1985
		Jul 1985
		Aug 1985
		Sep 1985
		Oct 1985
	AN	Nov 1985
		Dec 1985
1986		Jan 1986	AF
	AL AM AN AP	Feb 1986	AH AK
	AR	Mar 1986	AL AP
		Apr 1986
	AS AT AT AU	May 1986	AR
	AV	Jun 1986	AS AT
		Jul 1986	AU
	AW AX	Aug 1986
	AX AY	Sep 1986	AW AX
	AZ BA BE BE	Oct 1986	AA AY
	BA BB BC BD	Nov 1986
		Dec 1986	AZ BA BB BC BD
1987	CA CB	Jan 1987	BE
	CC CD	Feb 1987
	AN CE CF	Mar 1987	AN CA CB
	AN CG CH	Apr 1987	CC CD
		May 1987	CE CF
	AN BD	Jun 1987
	AN AN	Jul 1987	CG CH
	CK CL	Aug 1987
	CM CN	Sep 1987
	BF CP	Oct 1987	CK CL CM
		Nov 1987	CN CR
	AN AN CP CR	Dec 1987	CP
1988	BG BH CS CT	Jan 1988
	CU CV	Feb 1988	CT
	AN AN CW CX DN DN	Mar 1988	AN CU CV DN
	AN AN CY DA DN	Apr 1988	CW DA
	BK BL BL CY CZ DB DP	May 1988	CX CY CZ
	AN BM BM DC DD DR DS	Jun 1988	BM DC DP DR
	BN BP DE DT	Jul 1988	BL BP DB DS DT
	BR DF DG	Aug 1988	DD
	BS BW DB DH	Sep 1988	BR DE DF DG DH
	BK BT BV BX BY DB DK	Oct 1988	BS BT BW BY
	BV BZ DL DM DV OBV	Nov 1988	BX BZ DK
	DW EA EB EC ED EP	Dec 1988	DL DM DV DW EA EB EC
1989	BK DY EE EF EG ES	Jan 1989	BV DX EE
	DZ EH EK ET EU EV EV EW	Feb 1989	DZ EF EG ES ET EU EV
	EK EL EM ER FD FE FF FG FL	Mar 1989	DY ED EH EK EL EM EW FD FF
	EY EZ FA FH FK FP FR FT	Apr 1989	ER EX EY FE FH FK FP FR FS
	BK ED FA FB FC FX FZ GB	May 1989	EZ FA FB FC FT FX FY FZ
	FM FN FU FV GD GE GF GF GG GH GL	Jun 1989	FL FM FN FU GA GB GD GE GF GG GH
	AN FW GM GT GU GV	Jul 1989	FV FW GK GM GN GT GU GV GW GX
	GP GR GS GV GW GX GY	Aug 1989	GP
	GZ HA HE HF HG HH HK	Sep 1989	GR GS GY GZ HA HE HF HG HX
	GC HB HC HD HL HM HN HT HU HV HW	Oct 1989	HB HC HD HH HK HL HT HU HV HW
	AN HP HS HX HY HZ KA KB KC KG KH LA LB	Nov 1989	HM HN HP HR HS HY HZ KA KB
	KD KE KF KK KL KM KN KP KR LA LC	Dec 1989	KC KD KE KF KG KH KK KL KM KN KP KR KS
1990		Jan 1990	KT KU KV KW
	BK	Feb 1990	KX KY KZ
		Mar 1990	NA
		Apr 1990
		May 1990
		Jun 1990
	BK	Jul 1990
		Aug 1990
		Sep 1990
	EN EN	Oct 1990
		Nov 1990
		Dec 1990
1991		Jan 1991
		Feb 1991
		Mar 1991
		Apr 1991
		May 1991
		Jun 1991
		Jul 1991
		Aug 1991
		Sep 1991
		Oct 1991
		Nov 1991
		Dec 1991
1992		Jan 1992
	XB	Feb 1992
	XB XB XB	Mar 1992
	DU	Apr 1992