Emigration from the Dolomites to Venice was constant over the centuries. Many young apprentices in the squeri became masters and reached levels of excellence. The inclination of the gondola was fixed by Giovanni Casal from Zoldo, in the early nineteenth century, in the Squero ai Servi, San Marcuola. The motto: "boat of Casal, what else?" spread in Venice, as if to signify that such a degree of perfection was difficult to overcome.

The squèro is a yard equipped for the manufacture of lagoon boats. The descendants of the first Casal migrants bought the "squéro da sotil" in rio dei Servi in San Marcuola, in which people from Zoldo had been working since the mid-18th century.

The Giuseppe Casal and son company obtained the Gold Medal at the Turin exhibition in 1884, in Vienna in 1895 and the silver medal of the Royal Veneto Institute of sciences, letters and arts in 1897.