The complete set in detail

ZB65II
SG No. A98B
Holstentor at Lübeck : Watermark 'multiple letters', extended roadway - 1 Mk. ; green

ZB66II
SG No. A99B
Holstentor at Lübeck : Watermark 'multiple letters', extended roadway - 2 Mk. ; violet

ZB67II
SG No. A100B
Holstentor at Lübeck : Watermark 'multiple letters', extended roadway - 3 Mk. ; lilac-pink

ZB68II
SG No. A101B
Holstentor at Lübeck : Watermark 'multiple letters', extended roadway - 5 Mk. ; blue