I got my K1 in May '71, so I have had it 48 years 4 months.
The CB has an 11/70 build date so that makes it 48 years 10 months old.
I got an SL100 in the fall of '70. I gave it to my nephews about '90.
First bike was a Candy Blue Green K0. I rode it as much as I could in the summer of '70.
Sold it in the fall of '70 after the boss told me that the improved K1 would be out soon.