German Horological Institute. A rare spring driven escapement model of a chronometer tourbillon
Signed Fred B. Breitinger, German Horological Institute, Glashütte, Saxony, 1900s
The pivoted detent escapement with ruby pallets and impulse stone with uncut bimetallic balance, flat blued steel hairspring, mounted in a three-armed carriage rotating once in three minutes, with chased and engraved two pillar central support with spring drive mounted between two brass plates, under glass dome and mounted on black lacquered wooden base, signed
105 mm. diam. movement