I'm sure I have not fully communicated the design of the wheel-to-fork interface. Dimensions of the groove in the fork end, hex nut, and the existing fender washer. I might need a flange, but not too big of one. Here's the textual version:

For my rear wheel I have a steel wingnut with the "wings" on the standard drive side long nut with the holes in it to see if the indicator is aligned properly. It's obviously made for or by Sturmey Archer, though there is not branding stamped or cast into it. It's patinated but mechanically perfect (the threads work).

For the other side I have what should be the rear wheel match - it has the same wings but the barrel is much shorter since it's only a wheel retainer, not a guide for an indicator. The hub is an AW so there are no complicated do-hickeys needed on the left side of the frame. This one looks like it should work, but it will not thread onto the Sturmey-Archer non-drive axle stub. For this one I need to get inside the bore and try to assess the thread. I also need to measure the ID and see if it matches the existing hex nut, which seems original. If I can size the thread I can see if I can get a tap with a gradual diameter. I have a handfull of wingnuts branded "Verma," which do not thread onto the front or rear stubs.

I have another pair of smooth-winged fasteners which look a lot like the Sturmey ones, but which have a smaller ID. They seem llike they should fit my front axle, but they will not engage their threads.

More later, this was really just all about threading, not the front clamp interface.