URBAN JURGENSEN & SONNER BY DEREK PRATT
TWIN BARREL TOURBILLON POWER RESERVE YELLOW GOLD
Urban Jurgensen & Sonner, Copenhagen by Derek Pratt, No . 19003.
Made circa 1980.
A fine, large, heavy, exceptional and rare, 18k yellow gold openface
pocketwatch with one-minute tourbillon and power reserve.
Four-body, polished, glazed back displaying the movement.
Silver with black painted roman numerals, outer minute track, power
reserve at 12, subsidiary seconds. Blued steel Breguet hands.
Rhodium plated, three-quarter plate, twin-barrel winding, bimetallic
compensation balance, polished three-arm tourbillon indicating
seconds, steel flat balance spring with terminal curve.