Swiss gold skeletonized split-seconds chronograph Circa 1980

Gold skeletonized chronograph with 30-minute register by Omega
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A rare, large and unusual Swiss gold skeletonized pocket watch with a split-seconds chronograph and 30-minute register, circa 1980.
Skeletonized, gilt brass and brushed steel movement, fully chased and engraved, 23 jewels, straight-line lever escapement, monometallic balance, Breguet balance spring, swan-neck micrometre regulator. 18K yellow gold case. Visible brushed steel chronograph work on the back plate. Enamel ring with Roman hours, outer minutes/seconds track with Arabic five minutes/seconds numerals, subsidiary dial for the seconds, and original black skeletonized hands. Case and movement signed. Accompanied by original fitted box and winding key.
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Diameter: 69 mm
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Signed: Omega
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Overhaul recommended.
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The Olympic skeleton chronograph was made in small numbers in 1980, ready to celebrate 50 years of Omega’s association with Olympic timekeeping in 1982. This model was available in three different case styles: polished (the present watch), partially chased (Ref. BA 143.6717), and entirely chased (Ref. BA 143.6718). In the early 1980s, these watches were used in Omega advertising with the caption; Omega celebrates 50 years of Olympic timekeeping with a creation symbolizing 134 years in the craft of watchmaking.