D.R.G.M numbers

bazas

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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
 

new2clocks

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Apr 25, 2005
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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
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.
 

bazas

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

new2clocks

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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.
 

bazas

Registered User
Dec 3, 2015
45
4
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Country
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.
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
 

chimeclockfan

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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.
 
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bazas

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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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