Probably HANAU large silver tray, silver, around 20th century,

Probably HANAU large silver tray, silver, around 20th century, of oval form, the flag decorated with festoon and portrait medallions, lxw: approx. 60x40.5 cm, marked with unsolved hallmarks, probably pseudo-marks, weight approx. 1768 g. Signs of age and use. Tested for silver content.