Joseon Dynasty Bunwon Ware Tea Bowl Underglazed Iron Brown

This Iron-pattern tea bowl was made at Bunwon Ware in the late Joseon Dynasty.
Bunwon Ware is an official kiln of the Joseon Dynasty.
It has a semi-cylindrical shape that gently widens from the base, has a firm waist, and tapers towards the rim.
It weighs 319g, typical of Bunwon Ware tea bowls, and is heavy. 
The clay is thick around the base and gradually thins towards the rim.
The inside and outside of the bowl are painted with iron paint to create a pattern with varying shades of gray, like an ink painting.
A milky white glaze is applied in speckles on top of the iron paint.
The bold pattern resembles trees, and the white speckles look like sunlight filtering through the trees.
The black and white pattern has a three-dimensional effect, and is finished with a clear glaze on top.
The foot is exposed, double, and has a swirling interior, making it extremely rare even among Bunwon Ware tea bowls.

There is no conspicuous flaws. It has good luster throughout and is in good condition.