David
Note that the 1000 hub on the right is cylindrical & has closely spaced blinker pins, while the 1200 hub on the left is conical, or bell shaped & has pins more widely spaced.
The wheel & the complete horn switch assembly are identical between the two.
With the horn button removed, this is how you tell them apart.
The steering wheel in the photo at the head of this page is missing the imitation pads in the spokes but it was a common thing to remove them & it's possible that the originals are coming with it as the seller thinks he might still have them.
The largest of the pictures that I sent you is of both a B10 & B110 wheel together, You cab see the shape of the hubs in the picture & once you know what to look for, you can pick them at a glance.
This is a poor quality image of a Sunny 1200 Coupe Option wheel with an original horn button. [It's crook because I enlarged it from postage stamp size] The spoke pads have been removed, but it's otherwise all there. It belonged to a forum member who did not wish to part with it.
OK, I just saw the Wiki entry. All of these wheels came with the pads in the spokes, but removal was a common alteration, so the Wiki entry is in error when it says that the KB10 wheel had pads when fitted as original equip in GL models, but no pads when supplied as an option for non GL's
I bought my first one new from Nissan Aust in 1980 under the part number that described it as a Coupe Option part & as you can see, it has the pads.
[Wheel on blanket in previous post]