Hugh,
Photos of the Simplex LJ23 are here:
http://welcome.to/
Scroll down and click on "Parts Brands", then scroll down that page and click on "Simplex", scroll down that page and you'll find three different LJ23 front derailleur photos.
Good Luck!
David
David G. White Burlington, VT
Hughethornton@aol.com wrote:
> I am told that a Simplex LJ23 is the correct front derailleur for a late
> 1950s French bike I am building up. I have no idea what this looks like -- can
> anyone describe it or direct me to a picture anywhere on the web? Better
> still, does anyone have one that they would sell or exchange?
>
> Many thanks
> Hugh Thornton
> Cheshire, England