Does Anyone Have A Rim Cross Section Diagram?

[cyclingday]

So, since Lobdell and Willams produced identical profile rims throughout the same period of time, how do you tell them apart from each other?
I know that Lobdell had some makers mark stampings, but not always.
Has anyone seen a Williams rim with a makers mark?
I had a set of Troxel rims that were scripted.
Those were pretty unusual.

 

[Boris]

WHICH ONE IS CONSIDERED THE DOUBLE DROP CENTER RIM
SCHWINN USED IN 34-35?

I would like to know exactly what is considered to be a double drop center as well.

 

[SKPC]

Below is a 26" clincher that was on an early 30's motorbike project I have going. I have seen them in other sizes, but not in this 1.5" wide 26" version in 36h. Lobdel I believe?

 

[SKPC]

Bump-rims......Edit above post. I have seen these 26" rims mostly on 34 Hi-Lo's & other 34 bikes here on the cabe, but not on the ads in post #3. These above were found on my late 33-framed colson. Anyone have advertising of this rim in 26"?