Seth Thomas Mantel Clock

hank buck

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Dec 9, 2018
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Hi all
I liked the way this Seth Thomas clock looked and bid on it and won Yay! It is naked as far as ID So I would be grateful for a response . Its 121/2" x 5 1/2" x 9 7/8" with a ST movement that only had the trademark for ID. It runs well and chimes on 60 and 30 like an angel. Here are some photos of this handsome clock. Thanks. IMG_0537.jpg IMG_0524.jpg IMG_0526.jpg IMG_0521.jpg IMG_0535.jpg
 
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ChimeTime

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May 4, 2021
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You are indeed very lucky. This is a very fine Seth Thomas 8-day Time and Strike mantle clock fitted with the #89 movement from around 1910-ish. It looks to be one of their Adamantine line, and may be the model named "Belmont No.1". Adamantine was a plastic veneer ST used to mimic rosewood.

The #89 was one of their "work horse" movements and, if serviced and set right, will proabably serve you faithfully for another 100 years. They made this movement for decades. Every repairman has lots of experience with it and spare parts are plentiful.

It requires a dual-end winding key, size "6/0000". The 2 winding arbors rotate in opposite directions, so don't fight them. The small hole below the center adjusts the rate, which is typically around 9778 BPH.

To run its best, the clock needs to be set "in beat". And this is very important for good time keeping.

Hope this helps.
 

hank buck

Registered User
Dec 9, 2018
90
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8
69
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You are indeed very lucky. This is a very fine Seth Thomas 8-day Time and Strike mantle clock fitted with the #89 movement from around 1910-ish. It looks to be one of their Adamantine line, and may be the model named "Belmont No.1". Adamantine was a plastic veneer ST used to mimic rosewood.

The #89 was one of their "work horse" movements and, if serviced and set right, will proabably serve you faithfully for another 100 years. They made this movement for decades. Every repairman has lots of experience with it and spare parts are plentiful.

It requires a dual-end winding key, size "6/0000". The 2 winding arbors rotate in opposite directions, so don't fight them. The small hole below the center adjusts the rate, which is typically around 9778 BPH.

To run its best, the clock needs to be set "in beat". And this is very important for good time keeping.

Hope this helps.
 

hank buck

Registered User
Dec 9, 2018
90
2
8
69
Country
Thank you! yes it helps. I appreciate your input and thanks for doing it.
hank buck
 

Robert Gift

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Nov 12, 2012
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To run its best, the clock needs to be set "in beat". And this is very important for good time keeping.
Is "set in beat" adjusting (bending) the wire from pallet to pendulum stem so thathe tick is perfectly even?

Thank you
 

ChimeTime

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May 4, 2021
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Is "set in beat" adjusting (bending) the wire from pallet to pendulum stem so that the tick is perfectly even?
"Beat" is the cadence of the tick-tock sound. One way to describe it is to say it should sound like a person walking across a marble floor; steady and even. It should not have the syncopation of a horse gallop.

How Beat is mechanically set varies from clock to clock. On lots of American clocks you might physically bend the crutch. European clocks sometimes have adjustment mechanisms.

The Beat is a delicate adjustment and can be easily upset. While physical position is always the best starting point, just because a table clock is "level" or a wall clock is "vertical" may NOT ensure it will be "in beat".

Hope this helps.
 
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Dave T

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