Triplex TD Windshield Logo

On TDs, YTs & T-Types generally, the original Triplex windscreen logo is always on the passenger side and is located in the upper corner. This logo could be applied either on the inside or the outside of the screen and may face either in or out. On TDs original examples exist of all 4 possibilities, perhaps one reason being because the screens, like most TD components, came from a number of different suppliers.

Apart from some North American screens displaying the letters AWS above the logo, at least one LHD TD that I’m aware of, carrying an Australian Standards Institute logo, was exported from Abingdon into North America. If that was not just an isolated occurrence then English glass manufacturers could and would fit the one screen for either country. If so, it would explain why some logos are read from inside and others from the outside. Because the logo is always fitted to the passenger top corner, (which of course changes sides on LHD & RHD vehicles), this would effectively reverse the image.

All more modern M.G.s seem to have theirs on the inside facing out. Examination of two period correct photos of original North American LHD TD windscreens in my possession shows that one of the photographs carries the letters ASI & the other, AWS. It is almost certain that ASI refers to Australian Standards Institute and that AWS may stand for American Windscreen (or Windshield) Standard, however this has not been confirmed.

The Toughened windscreen was predominantly non export, as England was slow to adopt laminated screens for the home market. Regulations in the US changed in 1937 when safety (laminated) glass was mandated for windscreens in all models. The Australian & New Zealand Standard Safety Glass for Land Vehicles AS/NZS 2080:1995/2006 defines laminated safety glass as “a glass consisting of 2 or more sheets of glass held together by one or more layers of plastic material known as interlayers”.

The Triplex image was probably originally media blasted but may also have been acid etched. Apart from my research, information provided in an article by Doug Pelton from “From The Frame Up” (with contributions from TC aficionado Bob Watts, an active member of T-ABC), has been used to decode the symbols. Their research documents the Triplex story and is well worth reading: 2_Triplex_Glass_History_T_Series.pdf

All vehicles exported to Australia, New Zealand and markets further afield, (including some vehicles destined for North America as indicated above), carried the ASI Triplex logo. The word Triplex, the broken circle and the 3 X’s are explained in detail in Doug’s article. The word plate simply refers to plate glass. The L means laminated and the V stands for vehicle. This was confirmed by a retired Australian Standards Institute (ASI) employee. The heart or kite at the bottom is made up of the letters VSB, which stands for British Vehicular Safety.

On TDs the number from 49 to 53 refers to the year of windscreen manufacture. A more precise date of screen manufacture can easily be determined by the position of the dot above the word TRIPLEX. If placed above the T, it indicates it was made in the first quarter, above the R it means the second, above the letter I in the third & above the P it shows that the screen was made in the last quarter.

In both of the illustrations in my possession, the glass was made in 1952, evidenced by the number 52. In the illustration with the feint ASI at the top the dot is above the P indicating it was made in the fourth quarter of that year. It is not at all unusual to have an original screen manufactured in 1951 fitted to a car that was built in early 1952. The glass obviously precedes the build date of the car and is almost always from the previous quarter.

It is a Roads & Maritime Services requirement in NSW that all windscreens carry the ASI compliant logo. I was unable to source a screen manufacturer here able to supply a replacement screen for my TD with an accurate Triplex logo and as originality is important to me, I have had the range of 16 reversible and reusable TD stencils made locally in stainless steel. They cover the entire period of TD manufacture from the 4th quarter of 1949 to the 3rd quarter of 1953 and can be either acid etched or media blasted. I still have a few of each of the stencils for sale to help recoup the CAD and manufacturing costs.

So if you would like to have that extra touch of originality for your TD or YT when you need a replacement screen, then for less than the cost of a couple of dozen stubbies you can have an original logo! You can contact me on: 0424 067 250 or at pjbm(at) (please substitute @ for {at}).

Peter Hehir

One thought on “Triplex TD Windshield Logo

  1. Richard Michell says:

    Just a couple of immediate comments.

    The BS kite symbol does not, I believe, stand for British Vehicular Safety. It just stands for British Standard. It was introduced in 1903 and its first use was on steel tramway rails (see BSI website.

    The AS symbol is probably AS1 (not ASI). The AS stands for American National Standard and that institution has a series of “rankings” for auto glass. AS1 safety glass can be used anywhere on a vehicle, AS2 can be used anywhere other than on windscreens, etc. I think it relates to the degree of optical transmission/distortion.

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