For OP, I'd venture a guess and say the armrest dimensions on a 767 are about 1.7" x 14"
Originally Posted by
GregInMN
It would really be interesting to see one of these seat charts (if they had them) from the 1970's. To compare seat sizes and leg room then vs. now.
*****
This website has some pretty interesting "old" seat maps, but not from the 1970s. Overall, seat width isn't much larger, if at all, but pitch seems a whole lot more.
http://www.departedflights.com/seatingguide.html