Accompanied by Thomas Engel Certificat No. 22 signed and dated 1981, original fitted wooden presentation box containing spare main-spring and a set of blued steel moon-style hour and minute hands.
Professor Thomas Engel, an international coryphée in the field of researching polymers, holds around 120 patents in organic chemistry and numerous honors and prices in this field, including the 1972 "Diesel Prize" that was jointly won with Dr. Wernher von Braun, one of the most important rocket developers and specialist of space exploration.
Professor Engel is not only a famous watch collector but also a passionate "self-made" maker of technically outstanding timepieces, often incorporating many style elements from Breguet.
These watches, as exhibited in the present lot, are now known as the "Engel Breguets" and are considered to be highly important collectors' pieces.