ALPINA ALPINER EXTREME CHRONOGRAPH AUTOMATIC 

AL-730SB4AE6B

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AL-730 caliber, automatic

62-hour power-reserve, 27 jewels, 28’800 alt/h

Brushed and polished stainless steel 3-part case

Diameter of 41 x 42.5 mm

Height of 14.30 mm

Scratch-resistant convex sapphire crystal

See-through case-back

Water-resistant up to 20 ATM/200m/660ft

Screw-in crowns and case back

Engraved case back

Silver dial with triangle pattern

Black outer ring with silver-tone markers

Applied silver color indexes filled with white luminous treatment

Black hour counter at 10 o’clock, hand-polished silver color hour hand filled with white luminous treatment

Hand-polished silver color minute hand filled with white luminous treatment

Black second counter at 6 o’clock, hand-polished silver color second hand filled with white luminous treatment