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Lovely piece of surveying equipment??

Recent comments130595 of 131192My 10 cent find.NAT KING COLE
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Posted 7 years ago


(1 item)

Can you help - I do not know what this is - I assume it is for map making or surveying - the name Cassella and No.769 cannot be traced anywhere if you know anything about this or whatever this attaches to I would be most grateful...

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  1. Savoychina1 Savoychina1, 7 years ago

    If you google "Casella, London" you will find a wealth of information. While I did not find the exact item I am sure if you contacted them with pictures they could identify it for you.
  2. Swanny, 7 years ago
    Thanks, Savoychina1 I have searched thier site and also found nothing exatly for this equipment, I emailed the company and they have no records dating this far back, I also contacted the Science museum in London who kindly informed me that there may be archives but I would have to get down see and view them...
  3. Savoychina1 Savoychina1, 7 years ago
    Wow, you HAVE done you homework ! What are the general dimensions of this ? Does the glass magnify or just allow light through?
  4. Swanny, 7 years ago
    Hi, the box is 20inches long so that should give an idea of the rest of it - there are 2 glass plates one fixed with the micrometer and the other adjustable to create a sort of stereoscope both have a black dot in the centre - there is also a spare glass which has measurements on, I have had this for quite a while trying to solve its hidden mystery!!
  5. Savoychina1 Savoychina1, 7 years ago
    Thanks. I will see what I can find...I love a mystery too !
  6. Savoychina1 Savoychina1, 7 years ago
    You may have already been here but this is such a great book.
  7. Savoychina1 Savoychina1, 7 years ago
    Swanny, I called CasellaUSA and talked to a very helpful man. He said that when Casella moved out of London to Bedford much of the archival material was lost. He said they get 3 or 4 calls like this a year about instruments that are long out of production. He actually went to the Collectors Weekly website and saw your instrument.

    His best explaination was this. In WW II after bombing runs they would send in aircraft with highspeed cameras to record the area. When the film was developed they would take the "before" and the "after" photos side by side and compare them with a stereoptic instrument to determine the amount of damage. This certainly fits for me. What do you think ?
  8. Swanny, 7 years ago
    Hi, very interesting - thanks, I have sent a set of pictures to a long retired RAF pilot who used to use these things in training.. will let you know what he thinks
  9. Swanny, 7 years ago
    Hi, we have decided that it is nothing to do with the photo reconaisance from WW2.. the equipment was a lot more unsofisticated and did not need the fine adjustment that this offers - at least we know one more thing it is not, so we must be getting closer to a solution!!
  10. Savoychina1 Savoychina1, 7 years ago
    Do you know a time frame for this item ? I am enclosing a website for Casella USA. It lists seven evolutions of the company logo. This item is version two. Bob Selwyn, at Casella, may be able to help. You can reach him after the 16th. Perhaps he could help at least with the time frame.

    Also, I contacted Nick at Scientific Collectibles and sent him the pics. I will let you know if I think of anything else.
  11. Savoychina1 Savoychina1, 7 years ago

    Whoops, forgot to enclose the main part !
  12. Swanny, 7 years ago
    Still no idea!! please keep looking - someone somewhere will know exactly what it is !! thanks for all your efforts so far.

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