Why do some cellos turn brown?

[T.G]

Originally Posted by airtrade

Strange thing is not all in the box turned so brown. No photoshop it is more pronounced on the white cutting board.
These are lot 23 natural from 2006.

No, not strange at all.

Uneven yellowing after that age is normal. Unequal airflow, uneven heat, how close the cigars are packed and how gasses are trapped or oxygen flow is restricted can all affect the cello.