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Thread: 904-906-908 Strange Rev counter? Any idea?

  1. #1

    904-906-908 Strange Rev counter? Any idea?

    Hello, i have found from a friend this rev counter. He had it for long time and he says it comes from an old racing preparation team
    and it's supposed to be 904-906-908 or other racing cars. Any idea or photos where it could be from?? 12000 RPM?!
    Thank you all for the appreciated suggestions

    <a href="https://ibb.co/cuTC9R"><img src="https://preview.ibb.co/hJYepR/dcdef114_61df_4340_8dcf_4ce25dd834b4.jpg" alt="dcdef114_61df_4340_8dcf_4ce25dd834b4" border="0"></a>
    <a href="https://ibb.co/kngX9R"><img src="https://preview.ibb.co/kYzKpR/8b659cf3_793c_4272_96bb_475fd8a5d6df.jpg" alt="8b659cf3_793c_4272_96bb_475fd8a5d6df" border="0"></a>

  2. #2
    Senior Member
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    Can you provide a closeup photo of the back showing the "IMPs"; it should be 30,000 +
    Porsche Historian, contact for Kardex & CoA-type Reports
    Addicted since 1975, ESR mbr# 2200 to 2023 03
    Researching Paint codes and Engine Build numbers

  3. #3
    Hi Dave, sorry for my bad english, i can't understand exactly what needs to be showed. If you can do a red circle on the photo or tell me how to narrow the photo i will be happy to do it..
    Thank you

  4. #4
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    No problem. Here is the back of an 8000 RPM tachometer. Notice the 12V 24000 Imp in the upper left corner. This is what we need to see, although the 6zyl is also important.
    Attached Images Attached Images  
    Porsche Historian, contact for Kardex & CoA-type Reports
    Addicted since 1975, ESR mbr# 2200 to 2023 03
    Researching Paint codes and Engine Build numbers

  5. #5
    Chronometric ...
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  6. #6
    here other photos from my friend, unfortunately no numbers on it..

    <a href="https://ibb.co/jh7DOm"><img src="https://preview.ibb.co/dnBwb6/2018_02_02_PHOTO_00000067.jpg" alt="2018_02_02_PHOTO_00000067" border="0"></a>
    <a href="https://ibb.co/jbxr9R"><img src="https://preview.ibb.co/dCsPUR/2018_02_02_PHOTO_00000066.jpg" alt="2018_02_02_PHOTO_00000066" border="0"></a><br /><a target='_blank' href='https://it.imgbb.com/'>image upload</a><br />

  7. #7
    Senior Member
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    Sorry, I must have been asleep. That has to be an old style mechanical tachometer. The large threaded post on the back is where a cable would attach just like a mechanical speedometer. That puts it out of my range of knowledge.
    Porsche Historian, contact for Kardex & CoA-type Reports
    Addicted since 1975, ESR mbr# 2200 to 2023 03
    Researching Paint codes and Engine Build numbers

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