The F1 wheel was used on the Black models.
Its a multispoke alloy with fake plastic bolts to make it look like a modular design.
Very nice they are too, I have compared std 9 spoke, propeller, milly 9 spokes and F1 wheels on my trackcar and I recon these are the strongest.
It's standard Puma size (15x6j et34) they were also fitted to some mk1 Mondeos, but those have the wrong offset (et40)
As a solution to your 'winter wheels' search
Id go for a cheap (but straight) puma alloys and fit 185/55 or 195/50 Rainsport 3's or similar.
You'll not get steels with the correct offset and this will badly affect the Pukas handling, especially in winter conditions.
I hope this is helpful, Stu..