Experienced divers and spear fishermen will tell you with nostalgia, that this is the shape and size of one of the first diving masks, ever to be developed, that introduced us to the sea world.
This mask is still in high demand and is available, carrying the improvements of modern technologies.
The Balco 407 has the classic, round shape and is being developed of modern, anti-alergic silicone, with anti-glare and anti-thrash glass.
Its silicone skirt has been thermo glued and heat treated to provide water tightness.