SCSW2 mentioned this variation, I am not sure if the 3rd does or not. 2 says something like "a few" were made. To me "a few" means exactly that. A while back I had one also, in 99% condition with the original box, tools, the whole package. When I began to ask around, especially on the other forum, it turned out that several members had 6 1/8th barrel 66s. As I recall that means 7-8 of them anyway. I got the impression at the time that there were more than a few made, just looking at those who replied they had one too. I think at best they are worth a few bucks extra, but not really a significant premium. SCSW I think says 20% which I think is too high. I don't believe they are as uncommon as the book would lead you to believe, that you 2 also have this variation reaffirms that they are not that uncommon.