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From time to time I've seen references to "bumper" movements, always in the context of vintage Omegas. Can someone kindly describe what this refers to?

By the way, this forum is terrific. It's truly friendly, welcoming, and informative. Cheers to everyone and happy holidays.

Cheers, Joe
 

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An early automatic

Welcome to Omegaland, Joe!

A "bumper" is an early automatic movement. Unlike a modern automatic, where the rotor spins a full 360 degrees, the rotor of a bumper moves back and forth about 120 degrees, bumping off of a pair of springs on opposite sides.

Hope that helps.

eric
 

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Here is the cal. 332 movement of my "bumper" from 1950:


Turning the watch in your hand, you can actually feel the rotor bump against the springs at the end of its travel. The bump is not noticeable on my wrist.

My "bumper" is all original and is as accurate as any of my newer Omegas.

Welcome to the forum!

Fr. John+
 

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The bumper movements shown above are newer and a bit different from the one below: Buren Grand Prix calibre 525 automatic c1945. This features the upper part of the movement swinging back and forth like a pendulum...not many of these "first" bumper movements exist in full working order making them collectible...

View attachment 7206666 View attachment 7206690 View attachment 7206762 View attachment 7206802 View attachment 7206842 View attachment 7206898 View attachment 7206930 View attachment 7206954
 

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The bumper movements shown above are newer and a bit different from the one below: Buren Grand Prix calibre 525 automatic c1945. This features the upper part of the movement swinging back and forth like a pendulum...not many of these "first" bumper movements exist in full working order making them collectible...

View attachment 7206666 View attachment 7206690 View attachment 7206762 View attachment 7206802 View attachment 7206842 View attachment 7206898 View attachment 7206930 View attachment 7206954 ..soon to be offered up for sale
 

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I know this is an old thread.. but an Omega caught my eye..and was curious about the 'bumper movement, hence, I found this thread.
Can anyone provide some info on this piece, ie dating it and movement. Don't see a movement #, ie 332 ... so wondering about this watch and if worth pursuing..?!?
Thanks for your feedback...
cheers
 

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https://www.omegawatches.com/en-us/watch-omega-us-collection-omega-f-6231

Omega shows your case as introduced in 1952, but your movement number shows pre 1950, that said it's possible that the movement could have been used in 52
looking at your movement the bumper springs , or should I say lack of caught my eye
what am I seeing in the case at the bottom of the picture that looks like it doesn't belong?
 

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I need to stand corrected on the bumper springs, found this on ChronoMaddox

The 342 is identical to the 28.10 RA PC, but used concealed buffer springs.
 
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