18ct yellow gold Wrist Chronometer no. 7057

Case: s/n; 7057, 18ct yellow gold Dial: silver, E. Koehn, Geneve Movement: s/n; 7057, tonneau shaped caliber 11 ligne, 18 jewels, inscription on bridge; HR Ekegren made by E. Koehn, Geneva, Swiss, Eighteen 18 jewels, 1 x Poincon de Geneve quality seal. Same caliber as Niton and CH Meylan used, ebauche by Fils de Louis Elisee Piguet. Provenance: 1929 - HR Ekegren by E. Koehn, Geneva, but in all probability by Niton 2016 - Evans, Japan 2017 - Instagram, by account holder jaeger59 (Tokyo vintage watch hobbyist) Digital jump hour wristwatch made by HR Ekegren by E. Koehn, Geneve, but in all probability by Niton