The 3W front wheels are what I believe are called "side laced". The spokes meet the rim at the outer half, so the inner half of the rim carries no spokes. It's visible in my photos from today at Ledgerwoods, but not obvious. I really don't know whether that's an advantage or not but the old 3W in the photo has centre laced wheels by the look.
DaveW '05 Red Roadster S1 '16 Yellow (Not the only) Narrow AR GDI Plus 4