Short answers, pulled from the story.
Leopold Mozart wrote the Violinschule textbook during the year 1755 while he was thirty-six years old. He assigned the printing task to Johann Jakob Lotter in Augsburg and managed the publication process himself.
The author wrote the textbook during the year 1755 while he was thirty-six years old. The work went through two further German editions after its initial release, with subsequent versions appearing in 1769 and again in 1787.
Each copy cost 2 florins 14 kreuzer tyrolean coinage. The author reimbursed sellers at 1 fl. 45 kr. for each unit sold under a system that allowed booksellers to keep copies on commission until sold.
No chin rest or shoulder rest existed during that era as shown by the first edition portrait which displays a lightweight concave bow held by the author. This absence defined the physical challenges faced by players who had to support the instrument without mechanical aids.
Salaries at Salzburg remained low throughout his tenure there so this financial reality forced him to supplement his income by giving private violin lessons. His teaching success became evident through the extraordinary musicianship of his two children Maria Anna Mozart and Wolfgang Amadeus Mozart.