Cut the chicken wire to cover the entire back of the frame. (thepaintedhinge.com)
Charles Burchfield 1918 Signed and Dated Lower - Left Watercolor and Gouache on Paper 13.5 x 9.5 inches (original matboard with date is included on back of the frame) Exhibited:... (1stdibs.com)
Signing up for an account requires you to enter the serial number on the back of the frame you bought so the two are instantly linked. (businessinsider.com)