I just bought four (4) of the 3-ear Borrani style spinners, and I'm quite sure you'd get thrown off the field with these, but they sure are pretty (pretty heavy too).
A <valid> point that I do want to make though, is that fresh out of the box, they're a bit tight on the threads; these being the 12 t.p.i variety. I spent a few minutes with a fine polishing stone on the internal/external threads and then a swipe with a wax stick lubricant, and after working them on and off a few times, they now live up to the term <span style="font-style: italic">Spinners</span>. These were on brand new hubs too (well 3 of 4, the LH front is on B/O).
All of the above were sourced from Moss Motors, and the quality appears to be very good.