Vintage BMW Motorcycle Owners

I am considering selling some original fuel tanks.

The /2 tank shape is quite simple with a side toolbox and flat sides.

But then I have one with the top toolbox lid with flat sides. I have that as a R26.

The R69S also has a top toolbox, but with wider sections (bulge) on the sides.

Is this correct?

Weren't there two tanks for the /2 and R69S? I have the small tank on my R69S but there was also the larger sport tank.

Yes, 6.5 gallon tank, just sold one in forum below.
Scott