The object of the image is a US postal scale (datable to the 1940s) that belonged to Stephen Kielbasa (1917-1975), born in the United States of Polish immigrant parents. Its history is linked to that of its owner, Mr. Kielbasa. After the end of the war, Mr. Kielbasa worked as a mechanization technician at the parcel sorting department of the Tapley Street Annex Post Office, in Springfield, Massachussetts. As part of the family had remained or returned to Poland, and letters were the only means by which to stay in touch, Mr. Kielbasa kept a constant correspondence with his relatives, hence the need to purchase this postal scale for home use. The scale shows the shipping costs corresponding to the weight of the letters, so you could know how many stamps to put on the envelope without having to go to the post office. In the Kielbasa home, as in any US home, it was customary to send letters and postcards to numerous relatives and friends for all the most important occasions and holidays, so this scale was certainly a valid helper.