[CR]ID this Simplex rear derailleur please?

http://www.birfield.com/~morgan/images/bikes/63_px10/simplex_rear_derailleur/

Which Simplex is it? Is it about the right vintage for my '63 Peugeot PX-10E?

It's internals:

http://www.birfield.com/~morgan/images/bikes/63_px10/simplex_rear_derailleur/tn/img_4035.jpg.html http://www.birfield.com/~morgan/images/bikes/63_px10/simplex_rear_derailleur/tn/img_4037.jpg.html

...look very similar to the one that was on the bike:

http://www.birfield.com/~morgan/images/bikes/63_px10/juy/tn/03.JPG.html

Sorry for the long URLs and blurry pics. My digicam doesn't do close-ups well.

I couldn't find it here:

http://members.aol.com/~satorumas/brands/simplex.html

Instead of a badge it's got a stamped logo on the outer face on the parallelogram, and instead of convex allen bolt heads at either major pivot, it's got flat, flush allen bolt heads. The three rivets holding three of the corners of the parallelogram are different, too. The cage is the same shape, but with squared-off edges rather than rounded edges.

My friend Bob gave it to me. I'll use it for this bike I think, unless providence leads me to a JUY 61. Any of you have a simplex pulley for it you can spare?

Thanks,

Morgan "What pommade did Anquetil use?" Fletcher Oakland, CA