9 3/4”’ | Hand Wind | Swiss Lever | Indirect Sweeping Seconds |

Remarks:

• Riveted crown wheel (on the original Bifora it is screwed)
• Some of these movements also have plastic parts

• Listing ID: 3959
• Manufacturer / Brand: Jayco / Bifora
• Caliber: Jayco 91 = Bifora 91/1 SC
• Size in French Lignes: 9 3/4'''
• Size range mm largest diameter: 0 - 22 mm
• Shape: Round
• Winding: Manual (Crown)
• Hands Setting: Crown
• Seconds Hand: Sweeping seconds (central seconds)
• Escapement: Lever (Swiss, English, Glashütte)
• Date, Day, Month...: None
• Jewels: 17
• Setting Lever Screw/Pin Position: Left
• Balance Position: Bottom (120 - 240°)
• Shock Protection: Novodiac
• Beats per hour: 18,000
• Balance Type: Nickel
• Power Reserve: 44 hours
• Production Period: Unknown, probably ca. 1980 - 2000
• Country: India
• Identification: Movement construction identical to the Bifora movement. J 91 (J in a circle) marked under the balance, usually mirror-inverted, sometimes normal (see extra pictures)
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)
• External Link: https://uhrforum.de/threads/identifizierte-uhrwerke-die-weder-bei-ranfft-lorenz-noch-im-watch-wiki-zu-finden-sind.86322/page-17#post-2816570
• External Link 2: https://watch-movements.eu/blog/en/2017/11/19/bifora-and-jayco-a-german-indian-cooperation/