Hoax Post stamp sheet in tube

A cardboard tube (33 cm in length, 28 mm ø) with two stamps on it, containing a stamp sheet (40 x 30 cm) of 30 Hoax Post stamps with a portrait picture plus the words “Franz Immoos A-dam 1979” and “30 years smiling to you”, with 2 rubber stamped prints on the bottom of the sheet (same as on the tube), design by Immoos. Numbered/100, Amsterdam 1979 Very good condition.