Paul Ditisheim (historical watchmaking business)

The historical Paul Ditisheim business began as a regulating workshop in La Chaux-de-Fonds in 1892, according to the Historical Dictionary of Switzerland. It is an eponymous business distinct from the person and from later Solvil/Titus companies.

The HLS account links Ditisheim’s work to observatory timing competitions, a collaboration with Charles-Édouard Guillaume beginning in 1898, and later synthetic-lubricant research with Paul Woog in Paris during 1925–1935.

HLS describes conversion to a joint-stock company in 1917 and associates it with Solvil at Sonvilier. Joël Pynson’s archival reconstruction instead separates Paul Ditisheim SA, 1918 Solvil/Titus trademark registrations, and a Sonvilier Solvil factory founded in 1920. These descriptions require entity-level reconciliation, not an invented single foundation date.

Pynson dates the bankruptcy of Paul Ditisheim SA to 1929, distinguishes Solvil’s survival from that failure, and places Paul-Bernard Vogel’s control of Solvil in 1931. This is an attributed archival reconstruction, not a directly inspected liquidation file.

Antiquorum catalogues a signed Paul Ditisheim centre-seconds marine chronometer, movement and case no. 1011, circa 1920–1925, with a Guillaume balance. Its entry cites a comparable Greenwich museum chronometer and patent documentation, neither inspected separately here.

Antiquorum catalogues medical chronograph/tachometer no. 51199 circa 1920 and cites the same model in Ditisheim’s 1914 Swiss National Exhibition catalogue, page 26, class 42. The object’s estimated date is not the model’s first documented appearance.

Classify Paul Ditisheim as a historical business. Solvil and Titus are related business/trademark histories, not automatic aliases for every watch signed Paul Ditisheim or proof of present ownership of his original workshop.