Longines, Cal. 30CH powered, flyback chronograph, non-wing design, very rare yellow dial, circa 1948. The non-winged dial, which can be found on the early 30CH models, is a very rare yellow color that is rarely seen on the 30CH. The white circle and the tachymeter notation on the outer circumference, which can also be seen on the 13zn, are unique aspects of the early 30CH that left a shadow of the 13zn. In addition to its rarity, it is a wonderful piece with natural features. Longines' own caliber chronograph is a perfectly established masterpiece in the history of watchmaking and will continue to be appreciated and handed down in the future. The archival copy shows that it was shipped to France in 1949.