The article aims at publishing a pottery mould for a rectangular New Kingdom sealing plaque. The mould is housed at the Egyptian Museum of Bonn University, Germany, as part of the municipal collection Grevenbroich. After a discussion of its prosopographical data, an identification of the overseer of the treasury Netjeruimes, who is named on the mould, with Netjeruimes Pirikhnawa is proposed. The latter is, inter alia, known as eminent royal messenger from his tomb at Saqqara and in the context of the Egyptian-Hittite diplomatic correspondence. The mould therefore constitutes another significant entry to the prosopographical dossier of this Ramesside high official discussed in the article. The contribution is concluded with a short technological discussion of the use of such moulds for producing rectangular faience plaques.