This is a brand new still in the wrapper, though torn open, Czech made tank checker. This pressure checker was the product of a Czech firm called Sportklimex Praha, later called Aquacentrum praha. This checker dates from about 1971 and is made of chrome plated brass. It was made in Prague (Praha) and has a yoke very reminiscent of a Healthways regulator yoke. It is very well built and attractive. Any information about this item is welcomed from our Czech friends.