Silverstone is an automatic winding mechanical using the G-1721 caliber which is 13 ¼ with Cotes de Geneve and circular graining decoration. With 28 jewels, and runs at 28,800vph, it comes with blued steel screws and is adjustable at five positions.
The functions include hours, minutes, and small seconds. It comes with a second-time zone indicator in the center and big date with double disc at 6 accompanied by center flyback seconds. The chronograph has a minute counter at 3.
The three piece red-gold 5N18 case comes with curved sapphire crystal and has a diameter of 41.6mm. The caseback is attached by 8 screws. In addition, the back is engraved with the royal marine crown. This piece is water resistant to 160 feet.
It comes with black crocodile or alligator leather strap with polished and engraved red-gold buckle.
The silvered dial comes with luminescent red-gold-plated markers and center hands, along with red-gold-plated second time-zone hand and printed minute track.
The indications include small seconds at 9 with big date at 6 and minute register at 3, along with seconds counter and second time zone in center.
It is also available in steel with black, silver, or blue dials with leather strap or steel bracelet.
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