This is an extremely rare Seven Putter 1 of 3pcs that are early prototypes. This one is made of SM490A but also features the logo's in the back cavity logo & seven text what's also very special about it is it's milling it has extra fine face milling done tight by Gold's Factory.
This putter is finished in matte soft black with a combo of white paint and translucent gray paint fill in the large kanji to show it's intricate CNC milling. 34" with a 350g head weight.
After this putter is sold there are no more like it.