It looks like a Garden Spot made by Mellinger Manufacturing Co. There is a 1951 ad in Dave Baas's book. The standard model included the cultivator. Attachments were 30"x36" utility cart, 30" sickle bar, 10 gallon sprayer, air compressor and 30" front blade. There is a picture of one here
http://www.mindspring.com/~fred_brown/
Garry
http://www.mindspring.com/~fred_brown/
Garry