Here's a photo of a subtitle shot from ROTJ from an eBay auction of a ROTJ 16mm print (photo is a bit fuzzy, but you get the idea). Some members of the forum had never seen SW or ROTJ theatrically, and I remember some discussion a while back of what the theatrical subtitles looked like, their placement, etc (vs the DVD and LD subtitles). I remember I also mentioned once that I had seen a couple of those 70mm collector film frames (from Willitts Desigins) on eBay that featured film cels with subtitles, but I was never able to find a photo of one again and I don't have any in my collection.

Anyhow, here you go:

http://img411.imageshack.us/img411/7571/4d781sk3.jpg