Curly lamp post-1 gallon heavy base of these have a slight crook

A very unusual form of Norway maple with shiny green, wavy edged leaves that clump together on a single trunk. Great specimen. Grows slow and very hardy. Zone 4. Fall color is yellow/gold. 12 ft in 10 yrs. May create side branches but will only become 1-2 ft wide. Grows in most soils. Full sun.