Hallo GR Diesels, over here in Belgium came the SR and R61 box at the end of '69 and only before there was the R60
I never saw a F89 with a 8 speed box,but it was on display in the brochure, so if you wanted one you could have one R61 from new.
But as a second hand one you never can trace how it was built from new.
And on the picture you show that will be an after 1973 model. Nice to see, you have over there still lots of beauties.
Cheers Eric,