Coddington Magnifier 10x 23 mm This Coddington Magnifier is perfect for watchmakers, clockmakers and jewellers. With a thick lens this magnifier has an excellent magnification. For hobbyists such as gem collectors and watch collectors, this magnifier is perfect as it can fold up and safely be placed in your pocket to go along with you on your adventure. This is the largest diameter lens we have in a 10x magnification.