Clamshell cases are, in essence, rare. And I am glad that these watches have gained some popularity amongst collectors because they truly deserve it. The build quality and reliability on these really trump some of their competitors. If you are wondering what a clamshell case is: a waterproof case in which the mid and back part of the case are held together by screws, in this particular case, four.
This specific watch was manufactured by Breitling and purchased and marketed by ‘Southwest Instruments’, a company and shop founded in 1926 in Southern California that sold nautical and aviation equipment.
Inside we find a Venus 150 caliber that works flawlessly and it is a true bless to operate. The multi-scale dial is in excellent condition, feauturing a telemetre scale in the outer part of the dial and a tachymeter on the snail scale.