This is a Josef Kreuzinger Violin Made in Germany around 1924. Josef Kreuzinger was a German luthier whose works were deemed as excellent and professional.

We have here the Orfeo Carletti Violin made in 1932. Orfeo Carletti is an Italian violin maker who opened a workshop together with his father and brother in Bologna. 

Handcrafted in Romanian workshops featuring highly flamed maple back, sides and neck and close-grained Carpathian resonance spruce top.

Check out the Italian Copy of Geovanni Schwarz violin made about 1920. Geovanni Schwarz was born in 1865 in Padua, Italy who by the influence and tutelage of his uncle Eugenio Degani honed his skills, established his own workshop, and won a gold medal in 1916 in Rome Italy.

Over 25 years, Ryszard conducted numerous experiments, conducted intensive studies, gained valuable experiences, and was influenced by his colleagues, all of which contributed to his gradual perfection of the sound and quality of his instruments.

This violin is labelled "Antonius Vinaccia, Napoli in Via Constantinii, a. 1792" and shows evidence of being repaired in 1902. Antonio Vinaccia was a renowned instrument maker in Naples during the mid-18th to late 19th centuries. He was known for making violins in the style of Gagliano and exceptional mandolins. His craftsmanship is preserved in Naples's Museo Spagnuolo (Palazzo degli Studi). Antonio's sons, Gennaro and Gaetano, also became instrument makers.

This is the Paul Kaul violin made in France dated 1918. Paul Kaul is a French violin maker who joined several workshops such as Thibouville Lamy, Silvestre and Maucotel, Vuillemin-Didion. He started several workshops on rue Racine, Nantes in 1907, rue du Pont Communeau in 1908, and at 130 Boulevard Brune in 1926. 

A violin made and labelled in 1917 by Leandro Bisiach (1864 – 1945) of Milan, an Italian violin maker born in Casale Monferratos, known as the father of violin makers in the Bisiach family.