Attached is a picture of the manufacturing code or date from the seat end of the non- wrinkle fuel tank from my CB750 K0 diecast, frame VIN #10175xx, manufactured 12/69. I’m trying to determine whether this was the original tank, or a replacement.  I have owned since summer 1974 and I never replaced it, although I had it painted a couple times and was planning to get it painted back to the candy blue green original color. It is unknown to me if the previous owner(s) had ever replaced it.

The bike has been dormant under tarps for 25+ years, but I am undertaking a restoration as a hobby in my spare time. Should a K0 of this VIN range, have had a wrinkle tank originally? Can anyone decode what I believe is the date of manufacture? Thanks all!

PK