Vintage Gruen: For Sale/Wanted/Free » Sweep Seconds Wheel for 803SS

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Sweep Seconds Wheel for 803SS [message #4346]

Sat, 18 October 2014 12:24

koskid
Messages: 37
Registered: March 2014
Location: San Francisco

Gruen Apprentice

I picked up a nurses watch with an 803ss movement that's missing the sweep seconds wheel. Has anyone got one that will fit.
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Re: Sweep Seconds Wheel for 803SS [message #4586 is a reply to message #4346]

Sat, 15 November 2014 20:14

koskid
Messages: 37
Registered: March 2014
Location: San Francisco

Gruen Apprentice

Couldn't find a sweep seconds wheel, so I thought I'd try and make one.

Progress photos below, more to come later.

Donor 3/0 pocket watch movements.
index.php?t=getfile&id=1873&private=0

Homemade anvil since I don't have a staking tool.
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Ready to remove pinion.
index.php?t=getfile&id=1870&private=0

Looks like it should fit.
index.php?t=getfile&id=1872&private=0

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Re: Sweep Seconds Wheel for 803SS [message #4587 is a reply to message #4586]

Sat, 15 November 2014 21:42

JackW
Messages: 1979
Registered: May 2013
Location: Denver

Gruen Authority
Head Janitor
Site Admin

Is it the right tooth count? Also, if you need to remake the retaining spring, a bit of length from a broken mainspring will work.

All I know is based on hard work & writing by others. I can only aspire to augment this body of knowledge. If I am wrong it is because of my own failings. -me

"If I have seen farther it is by standing on the shoulders of giants." - Newton

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Re: Sweep Seconds Wheel for 803SS [message #4591 is a reply to message #4587]

Sun, 16 November 2014 02:05

koskid
Messages: 37
Registered: March 2014
Location: San Francisco

Gruen Apprentice

Tooth count is correct. That was the hardest part in finding a suitable donor. Newer vintage movements have finer tooth profiles and higher tooth counts. I might have to make a retaining spring also, we'll see if I can straighten the one that's there.

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