I continue to gather photos of as many date-coded vents as possible. Here's the list of what I have so far. Shooting for the best shot of each year/era as I can come up with. Check the list and post what I'm missing. I know I need the following: D, G, L, and the two-letter codes DO, AA. Clean or dirty, as long as they are legible.
As always, try to make them look like this one: (in focus, full vent straight on with a little room around it.)
Pre-date-code vents I have:
WEBER BROS METAL WORKS - BAR-B-Q KETTLE - CHICAGO, ILL
WEBER-STEPHEN PRODUCTS CO. - BAR-B-Q KETTLE - WOOD DALE ILL
WEBER-STEPHEN PRODUCTS CO. - BAR-B-Q KETTLE - ARLINGTON HEIGHTS ILL
WEBER-STEPHEN PRODUCTS CO. - BAR-B-Q KETTLE - ARLINGTON HEIGHTS ILL - Pat Pending
WEBER-STEPHEN PRODUCTS CO. - BAR-B-Q KETTLE - ARLINGTON HEIGHTS ILL - Pat 3538906
WEBER-STEPHEN PRODUCTS CO. - ARLINGTON HEIGHTS ILL - Engraved outline Weber text
WEBER-STEPHEN PRODUCTS CO. - ARLINGTON HEIGHTS ILL - Raised stamped Weber text
SMOKEY JOE - Painted Offset handle
Galley Que - Painted and Chromed
WGA - Three hole
RANCH
Date-coded vents I have:
A - 1979
B - 1980
C - 1981
D - 1982 - MISSING
E - 1983
F - 1984
G - 1985 - MISSING
H - 1986
J - 1987
K - 1988
L - 1989
M - 1990
N - 1991
O - 1992
P - 1993
EH - 1994
EO - 1995
ER - 1996
EI - 1997
EZ - 1998
EE - 1999
DD - 2000
DA - 2001
DU - 2002
DT - 2003
DH - 2004
DO - 2005 - MISSING
DR - 2006
DI - 2007
DZ - 2008
DE - 2009
AD - 2010
AA - 2011 - MISSING
AU - 2012
AT - 2013