Hi Jonathan, Thank you for contacting Mearto with your appraisal inquiry. What an unusual piece; I'm not familiar with the artist or their work; I presume the glaze treatment is intentional and not burnt. Based on the photos and information provided, and subject to examination, this is: A vintage stoneware art pottery vessel unattributed maker, probably American, second half 20th Century Of asymmetrical form, with crackled glaze overall, marked underneath A.G. / V.13 / 1/20. 17 1/2 inches high, 12 inches wide CONDITION: Not examined in person but appears to be in good condition with PROVENANCE: inherited $300-500* *represents a fair-market value for auction purposes; retail or asking price may vary. Please let us know if you have additional items to appraise, and thank you again for using Mearto.