The image shows the back stamp of a 1989 Edwin M. Knowles China Company collector's plate titled "Show Me" from the My Fair Lady 25th-anniversary series by artist William Chambers. 

Plate Details

• Manufacturer: Edwin M. Knowles China Company

• Series: My Fair Lady 25th Anniversary Collection

• Plate Title: "Show Me"

Originally was sold for 30.79

• Artist: William Chambers

• Plate Number: 2090A

• Bradex Number: 84-K41-75.4

The current estimated market value for the 1989 Knowles My Fair Lady "Show Me" plate complete with its original box and Certificate of Authenticity (COA) is $9.00 to $15.00. 

While the plate originally retailed for around $27.90 when it was first issued, 1980s collector plates were mass-produced in large quantities, keeping modern secondary market values modest. Having the original box and COA preserves its maximum potential value, as plates missing these materials generally sell for under $5.00.