![]() ![]() Interestingly, it also shows the earlier rubber seal between the bumper and bonnet which is narrower than the later seal. Ian Howe adds "Another photograph of the fluted lights showing the simple horizontal lines and slotted screws. Scratches may easily be removed by polishing or by heating the surface of the material. Technicoll Polychloride available from 'The Tuning Shop'. Several commercial glues are available to do this e.g. PMMA can be joined using cyanoacrylate cement (commonly known as superglue), with heat (welding) or by using solvents such as di-chloromethane (methylene chloride) or trichloromethane (chloroform) to dissolve the plastic at the joint, which then fuses and sets forming an almost invisible weld. ![]() It has since been sold under many different names, including Acrylite, Lucite and Perspex. ![]() The material was developed in 1928 and first brought to market in 1933 by the Rohm and Haas Company, under the trademark Plexiglas. If you need to repair the lenses they are made of Polymethyl methacrylate (PMMA) a transparent thermoplastic often used as a lightweight or shatter-resistant alternative to soda-lime glass and historically has often been called acrylic glass. As these early lenses are now incredibly rare use utmost care and the correct fittings! herm4.html The correct screws and washers are essential otherwise the very fragile retaining mounts on the lens will crack and render them useless. The lenses are held in place by special screws #6806 which in turn are retained on the lens by a rubber washer #8620 (3/8" diameter - I bought these (M4 9mmx4mmx1.5mm). I do not know when this change occurred as it is undocumented by Lucas or Jaguar but observation of original cars suggests March 1965 (latest observed original car is 1E 30806) so the first 2,000 or so 4.2 cars had them as well. The fluted lenses are no longer available because the original moulds were irrevocably changed. This was achieved by removing the central part of the mould and letting in the new design. Where previously it was fluted it was replaced by a random array of small dots. For some reason (damage to mould or better light output?) Lucas/Jaguar changed the internal design of the lens. The original front side lamp lenses were of a simple design which had a series of 12 evenly spaced horizontal internal ridges or flutes running from left to right. The front lamps were common to both FHC and OTS with either a white or amber flasher lens depending on market. The lenses were made from Diakon (see page 11 for details). The front and rear lamp units were supplied by Lucas as complete assemblies. ![]()
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