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Topic: Window Date Codes

in Forum: C3 General Discussion


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Window Date Codes

Posted: 11/5/11 12:49pm Message 1 of 15
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manget1
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Indianapolis, IN - USA
Joined: 9/3/2006
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Vette(s): Silver 1974 Convertible - L82 4 speed Low miles (was only 8,900 when I bought it in March 2006) - Now 54K miles. Original owner bought it as an investment for son's college expenses. 2008 Jetstream Blue Convertible
I'm looking at a couple of windows (driver and passenger side) on e-bay.  The seller says they have a code of M74.
 
My car was built mid-March 1974.  What codes would be valid for my car? 
 
I'm just thinking that it wouldn't be a bad idea to have a couple of appropriate date coded windows in storage just in case one of mine ever broke.



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Re: Window Date Codes

Posted: 11/6/11 7:28pm Message 2 of 15
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manget1
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Indianapolis, IN - USA
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Vette(s): Silver 1974 Convertible - L82 4 speed Low miles (was only 8,900 when I bought it in March 2006) - Now 54K miles. Original owner bought it as an investment for son's college expenses. 2008 Jetstream Blue Convertible

Another try...




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Re: Window Date Codes

Posted: 11/6/11 7:52pm Message 3 of 15
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rod7515
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Red Lion, PA - USA
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Vette(s): 1974 White 350 Corvette, TH400 Automatic 1972 Tangerine /Go Mango Convertible 383 Stroker, 2004r Automatic
I cant answer your questions but I am sure that Joel and others will get you an answer  soon. I will be watching this thread as I would like to find some windows for mine as well.
Good Luck,
Rodney




Re: Window Date Codes

Posted: 11/6/11 9:18pm Message 4 of 15
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tb2k82ce
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Lemon Grove, CA - USA
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Vette(s): 1982 C3 Collectors Edition 44000 miles, sat in the sun most of its life, My wife purchased it for me for Father's Day in 2007 from her girlfriend that had it for 19 years. It is on the road again. I'm retired but it is now my daily driver.
When you get the answer email vettsteve@aol.com he has been collecting part for vetts for over 20 years.
 
 



Re: Window Date Codes

Posted: 11/7/11 6:08am Message 5 of 15
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Adams' Apple
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Duncanville, TX - USA
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Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas
Sorry fellers....I been sickerndog....Dead
The "M74" is NOT the glass date....it simply designates the use of the glass as a Corvette side glass.

Windows are dated as such...
Soft-Ray   Flo-Lite
Safety
AS2           DATE CODE
   Solid Tempered
DOT 15 M74(This designates Corvette Side window)

The date code will be 2 letters...the first designating the Month, the second designating the year.

Example: JL =May '74
The months codes are:
N= January
X
L
G
J
I
U
T
A
Y
C
V= December

Year codes are:
Y= '72
U= '73
L= '74

(LATE production '74s had side glass without the "Astro Ventilation" script, starting in June/July of '74. Earlier cars/glass will have the "Astro Ventilation" script)

See if he can get you the right letters to de-code the glass before buying. You could look at the glass on your car now and find the appropriate date to look for, but I would guess you would want an XL or LL for a March-built car.
hth



Joel Adams
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Re: Window Date Codes

Posted: 11/7/11 5:17pm Message 6 of 15
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manget1
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Indianapolis, IN - USA
Joined: 9/3/2006
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Vette(s): Silver 1974 Convertible - L82 4 speed Low miles (was only 8,900 when I bought it in March 2006) - Now 54K miles. Original owner bought it as an investment for son's college expenses. 2008 Jetstream Blue Convertible
Now that I know what to look for, I just checked mine and found "NL"
 
I'll check with the seller to see what hers are
 
Thanks Joel!



I wanted a Corvette my whole life, but I never dreamed of all the wonderful people I would meet because of it!


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Re: Window Date Codes

Posted: 11/7/11 5:40pm Message 7 of 15
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dskopp
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Oak Creek, WI - USA
Joined: 5/21/2008
Posts: 1965
Vette(s): 1981 Great White Shark. Red Interior, 350/190 hp. PS, PB (SS), A/C CC, T-Tops. Served three years in Active Duty Army, then Retired Air Force after 34 years! Badger State Vettes Car Club. 175,000 Original miles!! Now own a 1998 C-5!

Adams' Apple said: Sorry fellers....I been sickerndog....Dead
The "M74" is NOT the glass date....it simply designates the use of the glass as a Corvette side glass.

Windows are dated as such...
Soft-Ray   Flo-Lite
Safety
AS2           DATE CODE
   Solid Tempered
DOT 15 M74(This designates Corvette Side window)

The date code will be 2 letters...the first designating the Month, the second designating the year.

Example: JL =May '74
The months codes are:
N= January
X
L
G
J
I
U
T
A
Y
C
V= December

Year codes are:
Y= '72
U= '73
L= '74

(LATE production '74s had side glass without the "Astro Ventilation" script, starting in June/July of '74. Earlier cars/glass will have the "Astro Ventilation" script)

See if he can get you the right letters to de-code the glass before buying. You could look at the glass on your car now and find the appropriate date to look for, but I would guess you would want an XL or LL for a March-built car.
hth
Joel!!

You da Man !!!




     



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Re: Window Date Codes

Posted: 11/7/11 8:43pm Message 8 of 15
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Adams' Apple
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Duncanville, TX - USA
Joined: 11/8/2003
Posts: 20229
Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas
manget1 said: Now that I know what to look for, I just checked mine and found "NL"
 
I'll check with the seller to see what hers are
 
Thanks Joel!


A January date would be correct/"acceptable" for a March built car. My '74 is a June 27 build with all May dated windows...windershield, side, and back. It also has the side glass with no "Astro Ventilation" script. Does your March car have "Astro Ventilation" on the side winders?



Joel Adams
C3VR Lifetime Member #56    
My Link


(click for Texas-sized view!)             NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

Re: Window Date Codes

Posted: 11/8/11 4:04am Message 9 of 15
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manget1
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Indianapolis, IN - USA
Joined: 9/3/2006
Posts: 2431
Vette(s): Silver 1974 Convertible - L82 4 speed Low miles (was only 8,900 when I bought it in March 2006) - Now 54K miles. Original owner bought it as an investment for son's college expenses. 2008 Jetstream Blue Convertible
Yes, I have Astro markings.  The e-bay listing also says the windows also say Astro.
 
I didn't know that those stopped in mid-74!  Just another thing that makes that year unique...



I wanted a Corvette my whole life, but I never dreamed of all the wonderful people I would meet because of it!


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Re: Window Date Codes

Posted: 11/8/11 4:18am Message 10 of 15
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manget1
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Indianapolis, IN - USA
Joined: 9/3/2006
Posts: 2431
Vette(s): Silver 1974 Convertible - L82 4 speed Low miles (was only 8,900 when I bought it in March 2006) - Now 54K miles. Original owner bought it as an investment for son's college expenses. 2008 Jetstream Blue Convertible
Oops.  I just checked the listing again, and it does not specify "Astro."  I think I must have assumed that.  And when I look at the pix, I don't think I see the marking.
 
Dang it!  Not that I need the windows, but the price was right at $30 a piece.  Even if not the right date code, I'll bet I couldn't find a new replacement one that cheap if I did need one.
 
I'll see.  Still waiting on a response from the seller



I wanted a Corvette my whole life, but I never dreamed of all the wonderful people I would meet because of it!


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in Forum: C3 General Discussion


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