Dating Triplex Glass

I have been working on a works hardtop i bought a few months back which is fitted with a glass rear screen. I dated the glass to 1978 using the code sheets.

The dot in the 3rd X means gives the decade of 1970. The dot under the “e” in toughened gives the year 8.

So there is a good chance the hard top was made 1978.

triplex codes 1

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