KEYSTONE SOUND SYSTEMS LIMITED Company number 04952982 · Monitor this company Active Overview People 5 Financial Control Documents Analysis Location Related Registered office AddressThe Farmhouse Bass Farm. Black Drove,, East Keal Fen, Spilsby, England, PE23 4AB PostcodePE23 4AB Companies at this postcode 5 Average house price in PE23 4AB £375,000 (6 sales) Map