Sunroof option or not

I went to a pretty large multi manufacturer American car show today. Since all of you on this forum are pretty associated with and savvy with "A" bodies. I looked at a guys 1968 barracuda in a turbine bronze color and powered by 340. Nice looking car however something I was wondering about was I noticed it had a sunroof. It looked factory installed, but I don't believe there was such an option I just can't believe that it actually looked outside of either factory or dealer installed. Even the location of the switch ( toggle type ) under dash on drivers side of steering wheel. Can anyone here shed a little light on this? The owner can't give me anything to go on. Thanks, Al