Autokraft and Hawk 15" wheels (made from the Autocraft moulds) are different to the 60's ones I found. They show less threads protruding through the spinner. 7.5" and 9.5" wide from memory.
I have not measured the offsets but noticed it when I fitted some new Trigo wheels to a MK1V - they fouled the front steering arms. These were sold as 'exact copies' of the '60's wheel and are good value, although the rear dish section is wrong. They still look good though. Vintage wheels do a similar wheel that you can specify the offset on when you order.
Does anyone have any 15" Autocraft or Hawk wheels for sale? I need a spare set.