@Bob BQ and I got into a discussion about Black SJS model numbers and were trying to determine what those numbers are and when they changed.
If you have a NIB Black SJ please post (or send me) a picture of the box that has the model number as well as a picture of the vent with the date code. My goal here is to find enough NIB SJ's to figure out the date changes and also to provide a reference to ID SJs in online listings with minimal pictures.
Here is what we have found regarding
Smokey Joe Silvers:
Up to 1974 -------------
SJ-100 - Model number appears in '62, '64, '66, '68, '71, '72, '73, and '74 catalogs (offset handle models).
1975 to 1976 ----------
Unknown - Have seen a SJ-100 box that is not an offset handle and no date stamp meaning SJ-100 could run through 1976
1977 to 1983 ----------
10001 - 1977 from Harris92 seen in post #2. 1979 Catalog shows the three wire leg setup with 10001 model number (as does 1981 catalog). 1983 (E-Code) box with 10001 (first year of loop legs).
?1984? ------------------
10001 / 50012 - Box with 1982 Copyright and Palatine, ILL. location marking. In 1984 Weber moved to Palatine.
1985 - Unknown ------
50012 - 1985 (G-Code) through sometime before M-Code (1990)
Unknown - 1999 -
10001 - Have Seen 1990 (M-Code) and 1997 (EI-Code) boxes with this model number.
2000 - Present ---
10020 - Changed when plastic handles were added in 2000.
Here is what we have found regarding
Smokey Joe Golds:
1989-1999 --------------
40001 - 1990 & 1998 confirmed. No indication of other model numbers in existence.
2000-present -----------
40020 - Potentially changed when plastic handles were added in 2000.
Much less information for SJG's except for a couple of miscellaneous boxes shown below.
The proof so far for SJS'sWeber catalogs:
http://weberkettleclub.com/old-weber-catalogs/1962 Catalog - SJ-100
1974 Catalog - SJ-100
1975-1976? - No date stamp wire leg SJ-100
1977-78? No Code from
@harris92 .
No letter code on the vents. The paper work is dated 1977. 
1977-78? No Code from
@Bbqmiller . Paperwork in the
original thread show wheels from 1977 or later.
1977-78? No Code from
@mike.stavlund .
Original thread here.
Pre date-stamp, clearly, but post 1977 which the copyright on the instruction manual shows.
1979 Catalog - 10001
1980 B-Code Box
1981 Catalog - 10001
1981 C-Code Box (from
@stellato1976)
1983 E-Code Arlington Hts, IL Box (1982 Copyright)
1984 or later Palatine, Ill Box (1982 Copyright)
1985 G-Code Box
1985 G-Code Box #2 (from mdb240)
1985 Copyright Box
Matches to 1988 J-Code box from an
SJ owned by mcgolden
1990 M-Code Box (1989 Copyright)
1991 N-Code Box (no model number angle, but otherwise matches M-Code)
1997 EI-Code Box
2000+ Plastic Handle Box
-This box matches mcgolden's
2000 Sam Adams SJ:
-Other later year boxes:
The proof so far for SJG's1990 M-Code Box (1988 Copyright)
1998 EZ-Code Box
1999 EE-Code Box (1996 Copyright)
2000+ Plastic Handle Box
Topic: Attn: NIB Black SJ Owners (SJ Model Number History) (Read 4254 times)