Fig.1: Friesland speed skates, around 1915
Hhandmade traditional model in luxurious finish. They have worked out platforms that match the shoes or boots bottoms and a nice curl. The slots in the platforms indicate the use of luxurious straps as well. 

manufacturer: Royal A.K. Hoekstra & Co., Warga
Mark: see detail 1b

Technical data:
total length: 40 cm; height over ice: 3.3 cm;
platforms: 28 cm long, 6 cm wide;
runner blades: 11 mm tall, 2.8 mm thick;
weight: 270 g

Fig.3: Modern Friesland ice skate, model Easy Glider, 4th quarter 20th century
Nowadays Dutch children learn skating on this type of modern Friesland ice skates. They have a platform and straps of synthetic materials (detail 3b and 3c).

Manufacturer: Zandstra, Joure
Mark: detail 3a

Technical data:
total length: 36.5 cm; height over ice: 2.9 cm;
platforms: 30 cm long, 5 cm wide;
runner blades: 10 mm tall, 2 mm thick;
weight: 400 g