Unknown, help needed please.

[juvela]

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The forum just had another thread begun on a vintage saddle suspension machine with lots of bois -

https://thecabe.com/forum/threads/how-do-you-like-this.146301/

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[juvela]

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one more example -

Wanted: Vialle Freres bicyclette elastique | Wanted: Bikes, Trikes, Parts, Accessories, Etc.

Ever since I stumbled across this, I've wanted one. (Any of their similar models would do as well.) Image source: Copake Auction, April 18, 2015. I'm willing to consider anything in any condition, but I'd prefer one that is as complete as possible, so long as the basic parts are there and...

thecabe.com

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[dnc1]

Yeah, I saw this @juvela.
Sounds like he wants to build his own version.
Fairly easily done I'm thinking.
All you need is a ladies bicycle and a leaf spring from an old car!
And some welding/fabrication skills.