Here's my guess as to the actual manufacturer of the cranks. Compare the size of the individual companies. MAVIC... small. OMAS... small. SR... large (Sakae Ringyo is second largest crank manufacturer next to Shimano).
I'll go with SR
Chuck Schmidt South Pasadena, Southern California
Chuck Schmidt wrote:
>
> Compare and contrast...
>
> Mavic crank
> http://www.classicrendezvous.com/
>
> OMAS crank:
> http://www.geocities.co.jp/
>
> SR crank:
> http://www.geocities.co.jp/
>
> Chuck Schmidt
> SoPas, SoCal
> http://www.velo-retro.com (MAVIC Timeline)
>
> .