We had a similar issue with our 67. Ifni recall correctly there is a small brass washer between the speedo and the cable? I think it is there as a "spacer"?
Nope. There is a brass collar about 3/16 long pressed onto the end of the spindle. a thrust washer underneath it. The cable has a stop collar on this end of it also ( about 1 inch behind the end). Nothing that should fall out though.
