Originally Posted by Steelsewing

Yep. That's the 1957 Domestic Imperial Automatic. It began life as a Gritzner-Kayser made Gritzner model GZ. These are (or can be) wonderful machines to use. They are equal in build quality to the Necchi models of the era. Sewing machine oil as advised on all the joints. Let it sit a day, then work the hand wheel some and see if it frees up, and repeat - eventually everything should free up. Gritzner sold those machines under their name, under the Kayser name, under the White (651) amd Domestic names, and the Kenmore (117.740) as well. Things to look for - is if you have any or all of the stitch cams (small black about the size of a half dollar) they are not easy to find. Keep track of the feet - the true G/K feet have those initials stamped into them. With enough oiling and turning the machine should begin to respond. Anywhere a rotating or revolving piece of metal meets another a little oil will help. Keep a shop towel under it to save counter surfaces from the oil. It may take a few days of oiling and turning and oiling and turning simply because Gritzer used such high tolerances. It's worth the effort. They're heavy, but wonderful machines. I don't have that model yet (darn it) but have several. Keep asking questions.