Fantastic Jeff, thanks.
On the mysterious 11633, just shows you can never be too sure what Heuer produced. If I would have seen that on ebay I would have thought "nice franken" (it does look pretty nice) ... who else would own up to thinking that? OK, when there is a Camaro case with and Autavia dial, you know, but sometimes it is not so obvious.
And I also have to say, isn't that a really cool Ferrari on top of the helmet pages. That year and maybe the one before it, I think it was the 312T was my favourite F1 Ferrari. But I guess thats just about my age or that great Tamiya kit I spent so long making.