17”’ | Hand Wind | Swiss Lever | Small Seconds |

Remarks:

• Negative winding for American watch cases
• The movement is also available with a wheel train bridge instead of individual cocks
• Swiss patent number 16831 from 1898 stamped on the balance cock for Charles Brisebard for “Raquette Brisebard”
• As 18.79 ABC also with a height of 4.50 mm (built from 1905)
• Dial with 3 feet

• Listing ID: 851
• Manufacturer / Brand: Longines
• Caliber: 18.79 négative
• Size in French Lignes: 17''', according to the manufacturer 17 3/4''', but this can only be achieved together with the retaining ring
• Size range mm largest diameter: 31 - 40 mm
• Shape: Round
• Winding: Manual (Crown)
• Hands Setting: Crown
• Seconds Hand: Small seconds
• Escapement: Lever (Swiss, English, Glashütte)
• Date, Day, Month...: None
• Jewels: 15
• Setting Lever Screw/Pin Position: None (Negative Winding)
• Balance Position: Right (0 - 120°)
• Shock Protection: None
• Beats per hour: 18,000
• Balance Type: Bimetallic screw balance with flat hairspring
• Power Reserve: Unknown
• Production Period: Built from 1897, this movement ca. 1901
• Identification: In the book by Patrick Linder: At the Heart of an Industrial Vocation, Longines watch movements (1832 - 2007) listed as caliber 18.79 with normal winding, in the Classification Horlogère 1939 with negative winding.
• External Link: https://uhrforum.de/threads/identifizierte-uhrwerke-die-weder-bei-ranfft-lorenz-noch-im-watch-wiki-zu-finden-sind.86322/page-52#post-7139035
• Country: Switzerland
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)