This teapot was used by experienced master. Its soaked by high quality teas. That is why pot has such a nice shine. I leave it to the future owner to decide if to clean it or keep using it with its original patina. 
Period: 1970s
Weight: 57g
volume: 60ml
Bottom Stamp:  China Yixing 7:3
 
*please consider early factory teapots can have minor imperfections, tool marks, kiln cracks or fire marks. Please consider this, if you are looking for perfection this might not be for you. Old factory pots are perfect in their imperfection~