Fig.4: German ice hockey skates, 3rd quarter 20th century
Both heel and forefoot are fastened by means of separate double working screwing mechanisms that are operated with a key.
Manufacturer: Gloria, Remscheid
Model: Blitz.
Mark: 

Technical data:
total length: 33 cm;
platform: length x width x height: 28 x 9-11 x 5 cm;
blade: height x width: 19 x 5 mm, with gutter;
weight: 530 g.