This is a beautiful and rare industrial Singer 24-26 lockstitch sewing machine which is a bit frozen and therefore cannot be properly tested without cleaning. It appears to be complete with slightly bent two-prong thread guide which can be easily straightened.

According to Singer database, its Serial number AE483837 puts this beauty to April of 1937 manufacture date.

It's very small in size (comparable to Willcox and Gibbs) but mighty industrial model which requires an outside Thread Spool holder and a Treadle.