Thanks Dana!
The '69 switch has been reported to be physically different, although operationally the same.
View attachment 1715922277
View attachment 1715922290
physically they are different and wont fit, properly anyway. Bezels are different as well.
edit: Deleted comment about change in terminals as the diagram in the 1968 FSMs appear to have a mistake, 67 and 69 diagrams are correct.