@NenaX I’ve been doing research on two 111w155’s I recently acquired from the same place. #1 has a w1xxxxxx serial # which makes it manufactured in Bridgeport Conn. #2 is a 111w155 ( same tag ) but has the PA 740xxx serial # . My research found that it was manufactured in Wittenberg Germany in 1954. Hope this helps. All the parts are interchangeable on my machines as the previous owner at 93 had taken them completely apart and then assembled both as he saw fit.