Bumper vs. Rotor

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Bumper vs. Rotor

New postby Thawkins » Fri Mar 08, 2013 3:47 am

I have a seventies era Girard Perragaux that is a bumper movement. Why not a rotor type automatic movement. Seems there wold less shock and wear with a rotor than with a bumper. It is a good time keeper.
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Re: Bumper vs. Rotor

New postby 4thdimension » Fri Mar 08, 2013 6:54 am

Hi, I am surprised GP offered a bumper in the 70's. A good company using obsolete technology doesn't add up for me. I thought the last vestiges of the bumpers expired in the late 1950's. Their heyday was certainly the 30's into the 40's. It would be great if you could post a picture so we could see what movement we're talking about. I will go out on a limb and guess your watch is a bit older than you think. -Cort
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Re: Bumper vs. Rotor

New postby Thawkins » Fri Mar 08, 2013 11:13 pm

It is marked "Gyromatic", has a ten carat gold filled case and was a 25th anniversary award to my dad in 1978. I was under the impession that all gyromatic watches were bumpers. If I gently shake it, I can hear and feel something bumping but no ratational noise. Not sure how to post pictures to this site.
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Re: Bumper vs. Rotor

New postby Glyn Meredith » Fri Mar 08, 2013 11:23 pm

For posting images, please see this topic, Thomas:

viewtopic.php?f=54&t=315

If you are not sure after that, please post your pics to me. E-mail is the envelope on the RHS of this post. --->
Posted on GH recently? Your posts keep us going.

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Re: Bumper vs. Rotor

New postby 4thdimension » Sun Mar 10, 2013 10:27 pm

I will stand by my earlier response that gyromatics are full rotation autowinds. My confidence is bolstered after checking some of them on ebay. If I am correct you may want to have your watch looked at for an explanation of the bumpy noises you're hearing. Looking forward to pictures.
-Cort
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