D.R.G.M numbers

Discussion in 'General Clock Discussions' started by bazas, Jul 13, 2019.

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  1. bazas

    bazas Registered User

    Dec 3, 2015
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    I got two beautiful clocks for my birthday a grandfather circa 1850 and a grandmother, at a guess is 1920-30.
    The Grandmother clock has the mark DRGM 23170.

    I have done a search through the forums but cant find anything to help but have noticed a lot of clocks being dated via the number.

    I would be grateful if anyone could help with this.

    Thanks Baz
     
  2. new2clocks

    new2clocks Registered User
    NAWCC Member Sponsor

    Apr 25, 2005
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    Baz,

    DRGM is a German utility model patent. A clock can only be dated by DRGM on a "not earlier than" basis.

    Please provide pictures of the clock, especially the backplate of the movement, and we may be able to identify and date the clock.

    Regards.
     
  3. bazas

    bazas Registered User

    Dec 3, 2015
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    IMG_0559.JPG IMG_0560.JPG IMG_0553.JPG IMG_0555.JPG IMG_0556.JPG IMG_0557.JPG IMG_0554.JPG
     
  4. new2clocks

    new2clocks Registered User
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    Apr 25, 2005
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    I do not believe the "23170" pertains to the DRGM. I believe it is a manufacturer's serial number.

    We have contributors who can identify unmarked German movements. They should be along in time.

    Sometimes the gong bracket can contain clues to the manufacturer. A picture of the gong bracket may be helpful.

    Regards.
     
  5. bazas

    bazas Registered User

    Dec 3, 2015
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    Thanks. I also found the number 85 on the back but I believe this would be the pendulum length.

    I will be able to get better photos in a couple of weeks when I remove the movement for servicing.

    F9EA1DAA-880E-425A-8DCE-E5A80A559626.jpeg EBB76237-1325-4EBB-B36A-B0C2A63085A2.jpeg
     
  6. chimeclockfan

    chimeclockfan Registered User
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    Dec 21, 2006
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    Gong block is a typical German utility design made by gong suppliers such as J. Hengstler of Aldingen. Hengstler was the go-to German gong supplier of the early 20th century. This gong block is not indicative of the movement manufacturer. The movement's number 23170 is not a DRGM registration, it is a manufacturer serial number.
     
    bazas likes this.
  7. bazas

    bazas Registered User

    Dec 3, 2015
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    I think I have managed to date the clock to between 1901-1910. I found one selling on ebay that was almost identical apart from a pattern on the door.
     

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