Jesper
Wore out three sets of tires already!
I had not really looked closely at your photos, but the decals match (or very nearly match) my 1970 Sports (different model than yours), and the shifter with the plastic guard dates it more to the late 60s if it is original. I do not believe the gold bands were used for more than a couple years. My Sports happened to have an odd hub date code of 69 13 (last 2 numbers of year and number of calender month); but only 12 months per year so dates technically to what should be 70 01 (Jan. 1970). My OE shifter is the same as yours and was presumably the last year that style was used. My '72 has the next newer style shifter with same plastic guard, but different script (black letters with outline banner and no red 3 speed marking. B.72 is definitely the proper saddle for the period and is most likely OE.
My '70 Sports, and '41-'43 roadster (before completion).
My '70 Sports, and '41-'43 roadster (before completion).