An Amsterdam School clock, ca 1920 Hendrik Johannes Winkelman and van der Bijl studio and design by Hildo Krop. Around the 1920s, Krop designed several models of decorative objects and clocks for Winkelman & Van der Bijl. The Amsterdam School clock dating around 1920, made of copper and brass in a triangle shape on 2 feet with a dial in the shape of a sun with green color. Winkelman & Van der Bijl is a name that we often encounter when it comes to the Amsterdam School. The company was founded in 1911 by Hendrik Johannes Winkelman and Van der Bijl. Designed doors, lamps, stained glass, fences, fireplaces, clocks and facade letters, etc. Clock key included. The clock measures 28 cm high, 34,3 cm wide and 10,3 cm depth. This piece is attributed to the mentioned designer/maker. It has no attribution mark and no official proof of authenticity, however it is well documented in design history. I take full responsibility for any authenticity issues arising from misattribution