Could be wrong, but it looks like the picture of the Simplex Touriste double in the '52 catalogue.
Phil Sieg Knoxville, Tennessee
Donald Gillies wrote:
>>From the Japan Handmade Bicycle Show :
>
>Can someone identify this _aluminum_ stronglight 49D chainring on a
>TOEI? The 5 bolts connect to a ring with 3 main spider arms, each arm
>branches right away into 2 parts, creating 6 arms at the outside edge,
>which like a Stronglight 57 or a campy 42T NR - has very thin slots
>all along the outside edge. I am reminded of a Renee' Herse chainring
>with straightened web. For a picture (won't last), see this :
>
> http://www.popdan.com/
>
>- Don Gillies
>San Diego, CA