Exceptionally German gold one minute tourbillon Circa 1983

Gold watch with moon phases and power reserve 
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Exceptionally German 18 Carat gold and enamel, keyless pocket watch, circa 1983. One minute tourbillon regulator with thermometer and power reserve indication by Thomas Engel, Regulateur Tourbillon, No. VIII, the carriage by Richard Daners. A screw down engine turned back overlaid with translucent green enamel with very elegantly arranged gold paillon leaves, engine-turned band, gold glazed cuvette, ball shaped, swivelling pendant winder.
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Silver, two tone dial with champlevé radial Roman numerals, outer minute divisions, engine turned centre, 48 hour power reserve sector at 3 o’clock, subsidiary seconds at 6 o’clock, thermometer sector at 10 o’clock and gold Breguet hands. A half plate movement, Geneva striping decoration, a three arm carriage with lateral lever escapement, Guillaume balance with special non magnetic Nivarox prima balance spring with Phillips terminal curves with two pins for adjustment between horizontal and vertical positions, entire train jewelled, escapement with end stones.
Dial, case and movement signed.
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Diameter: 56.5 mm
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Signed: Thomas Engel  Germany
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Accompanied by the original Thomas Engel fitted wooden box and certificate.
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This superbly designed and equally well executed watch is a tribute to the horological talents and capabilities of late 20th century horologists. Professor Thomas Engel is known worldwide for his exceptional research in the production of polymers. In 1966, he developed a process for cross linking plastic extrusions, particularly those of cross linked polyethene. Based on the reaction of plastics at pressures of 15,000 to 150,000 psi and temperatures of approximately 300° and in the presence of a peroxide catalyst as a cross linking agent, this process was a significant step forward in plastics technology. It resulted in the production of a high molecular weight product having improved heat and chemical resistance, which is still in use over forty years later. Engel has received numerous prizes and honours for his work. In 1972, he was awarded the “Diesel Prize” along with Dr Wernherr von Braun, the rocket and space technologist.