Marcantoni 12,5 CA Concrete pocket slide rule full set 1960 Italy

This is dedicated pocket slide rule for calculation of reinforced concrete with special scale on both sides of the slider for the different amounts of reinforcement (1400 kg/cm2, but also 1600, 1800 and 2200 kg/cm2) It is made by Marcantoni from Milan in Italy. It has the number 12,5 CA for Cemento Armato (reinforced Concrete). It has the original leather pouch (unsigned) that is still shiny. It also comes with the original Italian instructions  and an Italian company name on the back. It also comes with the original 2piece outer box. It is all complete and in great condition. It measures ca. 15,5 cm or 6 1/4 inches. Do check the video below on how to work your vintage man tool : slide rule operation instructions!