σφραγιστήριον
From LSJ
ξένος ὢν ἀκολούθει τοῖς ἐπιχωρίοις νόμοις → as a foreigner, follow the laws of that country | when in Rome, do as the Romans do
English (LSJ)
τό, seal, stamp, PLond.5.1657.13 (iv/v A.D.); = signaculum, signatorium, Glossaria.
German (Pape)
[Seite 1052] τό, Siegel, Petschaft, Sp.