5 3/4 x 6 3/4”’ | Hand Wind | Swiss Lever | No Seconds |

Remarks:

• Sometimes also called DuRoWe 1980, because DuRoWe was part of Ebauches SA since 1965. But the movement is always marked with INT 1980.
• Spare part blisters for the INT 1980 are often labeld with the INT and DuRoWe logos, and with both 1980 and 1977-5 (see extra picture)
• Movement family:
  • AS 1977
  • AS 1977-2: Different parts compared to 1977: barrel bridge, barrel, mainspring, balance with hairspring
  • AS 1977-4: Different parts compared to 1977-2: balance cock, regulator
  • INT 1980 = AS 1977-5: Different parts compared to 1977-4: click, setting lever pin, higher barrel, mainspring, several other modifications
  • AS 1978: Like AS 1977, but with a rounded edges on the left and right instead of  straight edges
  • AS 1978-2: Like AS 1977-2, but with a rounded edges on the left and right instead of  straight edges

• Listing ID: 6024
• Manufacturer / Brand: AS / Dugena / Orient
• Caliber: INT 1980 / AS 1977-5 = Dugena 2133 = Dugena 2134 = Orient 21021
• Size in French Lignes: 5 3/4 x 6 3/4'''
• Size range mm largest diameter: 0 - 22 mm
• Shape: Form
• Winding: Manual (Crown)
• Hands Setting: Crown
• Seconds Hand: None
• Escapement: Lever (Swiss, English, Glashütte)
• Date, Day, Month...: None
• Jewels: 17
• Setting Lever Screw/Pin Position: Right
• Balance Position: Right (0 - 120°)
• Shock Protection: Incabloc and others
• Beats per hour: 21,600
• Balance Type: Glucydur
• Power Reserve: Unknown
• Production Period: From 1976 onwards
• Identification: Marked with INT 1980 under the balance wheel, with Dugena 2133 / 2134 on the ratchet wheel, or with Orient 21021 on the wheel train bridge. As INT 1980 described in "Neue Uhrmacher-Zeitung" 12/1976.
• Country: Switzerland
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)