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Berkey spring loaded seatposts

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Wheeled Relics

Cruisin' on my Bluebird
I am searching for information the Berkey spring loaded seat-post. I found an ad in a 1903 issue of bicycling and motorcycle review. Do any cabers have first hand experience with these that can offer more information on the years they were made. Any details appreciated.

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I'm not sure if my post is a Berkey. The Berkey's that I have been able to find pictures of have a round rod with a slot that slides into the post, while mine is square. My seat post has a shim brazed to it to increase it's diameter to fit the bike that it came to me in, a 1935 Adler Model 107 made in Germany. So perhaps my post is a variant of the Berkey or maybe a similar post made in Germany or somewhere else.


adler-2.jpg





Here are links to Berkey posts that I have found on the cabe




Thanks
Chris
 
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