No real damage other than the forestay. The mast came down very slowly, (I thought I was in a kung fu movie) and came to rest on the stern pulpit cushioned by lines and sails. It did take out the loran antenna, but I tossed the loran unit a year ago and had been meaning to throw out the antenna anyway.
The boat is a 1978 Cal 2-27, and it's possible those were the original cables. The stay was sheared right at the turnbuckle- slow corrosion at the weakest point. The lesson I learned is to replace all your standing rigging at least every 30 years on the dot, and don't procrastinate.