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Thread: Ventilation (?) holes in Bosch indicator lenses

  1. 05-19-2015, 03:58 AM #1
    fourteenten
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    Ventilation (?) holes in Bosch indicator lenses

    Hi,

    Just had a closer look at a few front and rear indicator lenses I have and noticed these strange (to me) small holes near the screw holes. Seems like original and not some DIY job, guess the were for some kind of ventilation, am I right? In what year was this used? Never seen them in the later model lenses. I have another silver lined lens with the same Bosch numbers but no holes. Please shine a light

    Kind regards,

    Cees
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  2. 05-19-2015, 04:00 AM #2
    fourteenten
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    vent holes

    ...and a few more. Only holes in the amber part.

    Cees
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  3. 05-19-2015, 04:33 AM #3
    moito
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    pretty sure this is home made.

    tooling for such holes would have been a nightmare.
    and why should they drill holes after painting the amber area?
    the last pic shows without a doubt this was drilled.
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  4. 05-21-2015, 01:12 PM #4
    classic
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    Home made crack prevention
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