1922 - Munich Industrial Fair : Watermark 'Network' - carmine ; 1¼ Mk.
1922 - Munich Industrial Fair : Watermark 'Network' - violet ; 2 Mk.
1922 - Munich Industrial Fair : Watermark 'Network' - vermilion ; 3 Mk.
1922 - Munich Industrial Fair : Watermark 'Network' - blue ; 4 Mk.
1922 - Munich Industrial Fair : Watermark 'lozanges' - brown / light orange-yellow ; 10 Mk.
1922 - Munich Industrial Fair : Watermark 'lozanges' - carmine / pink ; 20 Mk.