This Wheel Assembly includes 9 blades and 
the center hub.  It is designed specifically 
for a series of Richard Glässer small
Advent House pyramids 016290-016294.  

It may also fit other brands, including many 
early Expertic - GDR Era pyramids.

9 Blades (Paddles) - RG93017
    13,0 x 4,5 cm (5 x 1-3/4 inches)
Hub - RG162HUB - Decorated with Three Stars
    11,0 x 6,3 cm (4-1/4 x 2-1/2 inches)
Diameter Assembled - 36,7 cm (14-1/2 inches)
Hole for metal rod/shaft - 3,0 mm Ø Diameter

Made in Germany by RG
Erzgebirgische Volkskunst 
Richard Glässer GmbH Seiffen