Great work on the Toe Ring topic fellas. It was suggested to me that there is a connection with the change from a straight to bent Tommy bar, and the variation in toe ring styles, that I hadn't even considered.
If you check the second image Jonesy posted, you can clearly see that the bent end is used to fit the ring - it appears it was designed specifically for that. So it looks like the bent bar spanner and that style of Toe Ring came along at the same time.
Thought I would spice up the thread with this:
Feb 21, 1958 - Daily Mirror
I've also come across some intriguing new images. Remember the front flap variation we were discussing:
Now we have this photo, from a seldom seen Automatic pamphlet, and documented confirmation that in the month of October, 1957, changes were made to the Automatic...but the specifics of those changes are still not clear.
What to make of this new image? I'm increasingly convinced that the cable running from the flap to the axle housing is infact a throttle cable, which must have run through the height adjusting rod to the rear flap...maybe...