Hi Camille,

Thank you for contacting Mearto with your appraisal inquiry.
William Adams & Sons, a pottery firm in Staffordshire, England, produced these pearlware items from around 1769 onwards. Bearing the impressed mark "ADAMS," this bowl exhibits the typical features of this style, including the blue-decorated rim and the smooth, glazed surface.
While bowl like this often retail for several hundred or a few thousand dollars, when sold at auction, they rarely bring more than $400-600 each.
Based on the photos and information provided, and subject to examination, this is:

An antique William Adams blue-edged pearlware serving bowl
made in Tunstall, Stoke-on-Trent, late 18th Century
Of circular section with cobalt glazed rim with acanthus and roping edge, impressed below "ADAMS."
14 inches diameter
CONDITION: This bowl appears to be in good condition; value assumes no chips, breaks, repairs or losses.
PROVENANCE: Acquired at auction
$400-600*
*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, or questions/concerns, and thank you again for using Mearto.
~ Delia