This is an extremely rare Eberhard & Co. three register  chronograph, over-sized (40 mm). The 18k gold case shows little wear and the hunter caseback works properly. The dial is in excellent condition and the chronograph functions are in working order and the sliding lock functions well, movement runs fine.

I estimate the age of this watch to be late 1930's and before the name Extra Fort was used. The term 'pre Extra-Fort' is a phrase coined by collectors, classifying watches that came before the Extra-Fort model, introduced in the 1950s.This watch was actually their first (and for the world) 3 register w/hour counter chronograph. The watch was primarily used in military, motor sport, medical and technical applications.

This Eberhard is executed using the calibre 16000. These are not just rare; but especially rare in a tri-compax configuration. This is a one button chronograph. The top pusher manages all the functions; start, stop and reset. The bottom button is actually a slider that locks the top pusher so that no mishaps can happen. When the bottom button is slid up toward the crown, the top pusher will not operate. When slid back down toward the lug; the top pusher then is fully functional.

This Eberhard pre Extra-Fort three-register-chronograph is a collectors dream, a holy grail of chronographs in lovely condition and original in all parts. All of the hands on the watch are original and blued steel. The watch is fitted with a hand made DELAURIAN strap.

Maker: Eberhard & Co.
Model: Pre-Extra Fort
Reference: NA
Year: Circa 1940s
Case No: 1021883
Material: 18k gold
Lugs: fixed
Dimensions: 40mm diameter; 12mm thickness
Glass:  plexiglass
Lume: No
Caliber: Eberhard & Co. caliber 16000 manual-winding chronograph