eeekkk, what is this part?

[HappyHumber]

Try this one out for a mystery part

Stopwatch or at least fob/pocket watch (the ol' analog sort) holder

The URL also partially gives it away too, Pete... tsk.

[il padrone]

Yeah, I know it was too easy You have it correct, fob-watch holder

[Clydesdale Scot]

IP, that is exactly the clip I have been looking for to mount a tennis racket to the handlebars.
Said tennis racket is for swatting aggro magpies.

then you need one of these

http://www.ebay.co.uk/itm/Vintage-1940s ... 485aacd56f

[as7431]

I was talking to a friend who has campy running gear and looked down and saw these small red tubes on the end of his cables, where you normally put crimp on metal bits. I thought that they looked familiar, but took me some time before I remembered where. They appeared identical to the OPs photos

Tim

[eeksll]

thanks, now that you say it, the rear shift cable did not have a crimp on metal bit. I just assumed the LBS forgot it.

However, the other 3 cable ends did have metal crimp on bits.

[def]

Try this one out for a mystery part

I'd say that was a clip for mounting a stop-watch on your handlebars. For the time before electronic bike computers.