1940s Eska Val-22 Stainless Steel 38mm Clamshell Chronograph Tropical Yellow Two-tone Dial

1940's "Eska" ss 38mm with famous Val-22 popular clamshell chronograph? Very rare tropical yellow two-tone dial. It has a rare 4 screws early type waterproof case called clamshell. The dial is a condensed design with a tachymeter (blue), telemeter (red), and minute track (black) on the periphery, and the two-tone dial with a yellow tone texture and aging charm is a gem with great taste. It is a hidden gem that excels in design and quality even though it is an obscure type, such as the mounting of the famous Cal.22 made by Valjoux that many brands such as Rolex of the same age adopted.