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  1. #1
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    Default Trademark: Square/ Diamond with S

    A friend has a clock with this trademark

    It's a circumscribed Square,
    a 2nd square (diamond orientation) inscribed inside
    and there's a large capital 'S' within the diamond.

    It's similar to the Seikosha Trademark, but that
    one more typically has a circumscribed Circle with
    the diamond square inside, etc.

    Is this possibly a variation of the Seikosha <tm>,
    or is it identifiable with some other manufacturer?

    The round clock face measures about 13", Roman
    numeral chapter, and marked "Regulator". There
    are 2 winding arbors (horizontally spaced below
    the center) but no sub. seconds.

    It has a short drop pendulum, and a circular, plain,
    dark, wooden surround case.

    Any suggestions appreciated, and thanks.

  2. #2

    Default Re: Trademark: Square/ Diamond with S (RE: LloydB)

    Lloyd:

    Senkosha and Hayashi used an "S" inside a square, all inside a diamond (see Charles Davis Website here), but yours is apparently t'other wa around. Are you able to post a picture of the logo? If Charles Davis happens upon this thread, he maybe able to shed some light.

    All this, of course, assumes the clock is Japanese.

  3. #3
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    Default Re: Trademark: Square/ Diamond with S (RE: Steven Thornberry)

    Yes, much like those, but with the 'horizontal' diamond
    on the outside. I'll attempt to get a picture, but here's
    the drawing he provided

    Thanks for the suggestions -- interesting that none of
    the trademarks at that site have the external square.
    Attached Thumbnails Attached Thumbnails TrademarkS.JPG  

  4. #4

    Default Re: Trademark: Square/ Diamond with S (RE: LloydB)

    Could the dial be one of the replacement dials that Swiggart used to sell? Did they have a 'J" with the "S".

  5. #5
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    Default Re: Trademark: Square/ Diamond with S (RE: John Arrowood)

    Quote Originally Posted by John Arrowood View Post
    Could the dial be one of the replacement dials that Swiggart used to sell? Did they have a 'J" with the "S".
    Hi John; According to the new owner, the mark is on the movement,
    I didn't observe it directly. I'll try to get a look.

    However, other than "Regulator" in an arc over the center, there's no
    mark on the face/dial, which I did examine and measure. It certainly
    appeared to be the original dial.

  6. #6
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    Default Re: Trademark: Square/ Diamond with S (RE: LloydB)

    I'm re-informed that once the dial was removed (aluminum-backed,
    BTW) and the movement illuminated, that external 'square' morphed
    into a circle. So, it's Seikosha after all: Circle with inscribed diamond
    and letter S.

    The only other mark is a numeral 6 just above that trademark,
    located on the dial-side plate, left lower corner.

    I'll arrange to post a couple of pictures, if anyone has an interest.

    Thanks for the suggestions, the original information was incorrect.

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