Triplex Window Date Code

This document is released under the terms of the Creative Commons License unless otherwise noted.
Thanks to Chris Roop for writing this article.
Last modified 2010-05-13.

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TRIPLEX windows manufactured in the 1950's through the late 1970's can be dated with the 'TRIPLEX CODE' stamped into the glass.

Assuming that your car has the original glass, it can be used to fairly accurately date your car.

If you know the decade your car was produced, just look for two dots in the TRIPLEX logo on the glass.

One dot above T, R, E, or X gives the quarter of the year the glass was manufactured:

T is Jan, Feb, March, 
R is April, May, June, 
E is July Aug, Sept, and 
X stands for Oct, Nov, Dec.

To find the year of manufacture, look at the nine letters in the word TOUGHENED.
One dot below a letter gives the year of the decade:

T is 1, 
O is 2, 
U is 3, 
G is 4,
etc. 

If there is no dot, the year is a zero.

This code also works if you have a TRIPLEX window with the word LAMINATED instead of TOUGHENED.

Article by Chris Roop
Posted on: 2010-05-13

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Comments

Comments on this article –

Comment by Chris Salisbury at 2010-05-19 15:12:43
Rated this article: 10/10

Great info Chris! I was able to figure out the approximate date my car was made. Very cool.

Comment by Michael Caputo at 2010-06-09 13:02:00

Excellent! My '79 MeGaBeanie (windshield anyway) was made third Quarter of 78! Thanks Chris! Now if I could only get the VIN Genie to work for me.


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