During 1880–1881, Schall completed the mandatory one-year volunteer service in the military, and travelled to Paris, London and Switzerland.
On 24 January 1887, at Dresden he married Johanna Schmidlin (born 18 October 1859 in Giessbach – died June 1934 in Oberhofen).
[3][4] In September 1885, Schall and Gebbert trained Erwin Moritz Reiniger, who ran a similar workshop for electrical and physical devices in Erlangen.
The company went on to establish a collaboration with the Erlangen Frauenklinic (Women's Clinic) to perform early studies in radiation therapy.
[2][3][4] In 1888, Schall moved to London to open with his own capital, an agency of the RGS company for Great Britain and the colonies.
Reference is made to the use of a Joseph Leiter's (renowned instrument maker from Vienna) endoscope, illuminated with electric light, that was borrowed from Mr. K. Schall of 55 Wigmore Street in London.
[9] In July 1911, Dr. E. S. Worrall refers to the utilisation of apparatus to produce radiograms in very short exposure times, a half or a quarter of a second.