Two separate Schild operations were established by 1900
- Eterna (formerly Dr. Girard and Schild Ebauches, Präzisionsuhren-Fabrik Gebrüder Schild, Gebr. Schild & Co., and Schild Fréres) was established in 1856 and was split into two components under ASUAG in 1932
Schild & Co was an unrelated company established by Otto Schild of Grenchen in La Chaux-de-Fonds around 1900. It became famous for the Hebdomas 8-day pocket watch movement, which it produced until 1979.