Black Dial
Ingenieur 866 AD — Black Dial
Undated
Black dial on the original Gay Frères bracelet; one complete set was sold new in 1970 with its caseback tool.
No verified image of this watch yet
Identifying details
- Date
Date display.
- Ingenieur lightning-bolt logo
“Ingenieur” script with the lightning-bolt emblem on the lower dial.
- Soft-iron inner case
Soft-iron inner case and dial forming a cage that shields the movement from magnetic fields.
Variants of 866 AD
Reference overview →| Variant | Production |
|---|---|
| Black DialCurrent | Undated |
| Silver Dial | Undated |
Case & movement
- Reference
- 866 AD
- Production
- Undated
- Case serials
- Case material
- Stainless steel
- Case diameter
- 37 mm
- Water resistance
- 120 m
- Movement
- Automatic
- Date
- Yes
More specifications (1)
- Caliber
Movement
IWC 8541
1964 update of the 85 family: slightly smaller, with stop-seconds, improved drop adjustment and an eccentric regulator. 8541B uses a Greiner-type collet; 8541ES has antimagnetic parts. Used in the 866 AD and the Ingenieur SL 1832. The time-only version is the 854.
Automatic · Introduced 1964 · 21 / 25 / 28 jewels · Ø 28 mm · 5.88 mm thick