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age of glass

To: triumphs@Autox.Team.Net
Subject: age of glass
From: Ken Tharp <kthinc@dwx.com>
Date: Wed, 22 Jan 1997 09:13:50 -0600
Organization: Ken Tharp Homes, Inc.
Pat & listers,

> I hope the following will be of use to some folk.  My Triumph
> experience is limited to the later Spitfires and GT6s where this info
> definitely applies, but will also be valid for any Triplex glass.

[snip, snip]

As others have mentioned, I enjoyed the info on "dating" window glass.
Fortunately, it is fairly warm today, since I immediately had to go out
to the garage to inspect all of my Spit's glass. Having done so, I have
three questions:

1) My 1979 registered Spitfire with a factory hardtop has glass
manufacture dates ranging from August, 1979, to February, 1980. The
commission numbers indicate that this is a 1980 car according to the VB
catalog info. Is this anything to be concerned about, or should I just
forget about it and enjoy driving the car?

2) Including the hardtop, I have six panels of glass on this car. Five
of them have the Triplex info. The driver side wing window on the
hardtop has no markings at all - does this mean that it has been
replaced?

3) The rear window of the hardtop has a Triplex marking that doesn't
match any of your codes, Pat. The dot is under the "d" on "Toughened,"
indicating 1980, but the Triplex dot is over the "x." I double-checked
this, and there is only one dot there. The only other dot above the word
"Triplex" is the dot of the "i" in the word. Any info on this?

Thanks again for the interesting information. This list never ceases to
amaze me.

Ken
West Des Moines, Iowa, USA
'79 (or '80) Spitfire

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