Rare Frankoma Pottery Mug Orange embossed ‘John Zink Burner School’ Mug C

This is a C5 coffee mug by Frankoma and JOHN ZINK of Oklahoma! 
This vintage Frankoma Pottery Company coffee mug is a great advertising piece representing the John Zink Burner School. 
John Zink is a Tulsa, Oklahoma business that has been operating for about 80 years.

The mug is orange with a brown interior, and 'John Zink Burner School
 is embossed on the front and John Zink is embossed on the back of the mug.
Cup measures 4" tall and 4.5" wide with handle.
This piece is in Excellent Condition and would make a great gift for that Frankoma Collector!
We do have several other pieces of Frankoma Listed so check them all out.
Please look at the photos and ask all questions before purcahsing.
Thank You