I remember having the Huret items that operated by the screw-on peg (on the spokes)
Like one of these;
https://gonevintage.com/vintage-bic...lometer-ussr-1970s-boxed-papers-mint-nos.html
Also, an odd black plastic one, that operated via a small drive-belt from the ring on the hub
One of these, they even had a trip function
View attachment 435161
I remember the Avocets, very accurate indeed!
My first one was a
30, then a
40, & a
45
I may still have a couple of them somewhere??
I recorded my fastest ever speed on the
40
62.something MPH, down 'East Chevin' dropping, like a stone, into Otley