Vintage Set of 3 Desert Tone Ombre Fire-king Mixing Bowls #7,#12 and #20. Condition is "Used". These bowls are extremely old perhaps 40s or 50s.  I'm sure that the ombre coloring you see was not intentional.  I believe it's due to age and wear.  However, I really like what age has done to the outside of the bowl and the inside is like new. There are no cracks, or chips.

Please see photos.