Octo Octagonal

	Brand:
	Family:	Unknown
	Height:
	Jewels:
	Reserve:	8 days hours
	Frequency:
	Winding:	Hand winding, Two Barrel
	Diameter:
	Complications:
	Hands:	Central Hour Hand, Central Minute Hand

Distinguishing Technical Characteristics
Hand-Winding Clockwise Balance Cock Balance at 1:30 Barrel at 10:30 Barrel at 7:30
Production:  –
1910s	1920s	1930s	1940s	1950s	1960s	1970s	1980s	1990s	2000s	2010s	2020s

The Octo movement of the 1930s was an octagonal double-barrel movement patented as CH141602. This movement was very different from any previous 8-day movement in that it was shaped as an octagon rather than round. This shape eliminated the large single barrel so a double-barrel winding arrangement was created.

Swiss patent CH141602 was granted on August 30, 1929, to Ernest Tolck, Successeur de Marc Dubois et Cie, Fabrique Octo of La Chaux-de-Fonds. The patent expired, as shown by a notice in La Fédération Horlogère on April 1, 1936.

The octagonal movement lacks a seconds hand but has central hour and minutes. It was used in both travel alarm clocks and wristwatches, the latter typically also featuring an octagonal case. It was marketed by Tolck under the Octo brand.