Techni-Quadron Watches
The Techni-Quadron watches which were released in 1928 comprised of a rectangular face and were similar, to the Quadron. The top and the bottom dial were of similar big sizes, while the former consisted of the hour/minute, the latter consisted of the second hand.
The Techni-Quadrons were famously known as "doctor's watches" as this large seconds subdial was easy to watch while measuring a pulse. The watch was also popular among engineers and other technical professions. Take notice that not all dual dial Gruen watches were doctor's watches. The hour/minute hands on a Techni-Quadron are mounted above where the crown enters the case as apposed to the center of the dial. Some had an expanding buckle allowing them to be slid up the arm freeing the hand and wrist.
The Carr
French for square, which was released in 1931, was a convenient square-shaped pocket watch. The 12, 3, 6 and 9 numbers were arranged in the 4 corners giving it the shape of a diamond. It could be used by both the genders and hence was marketed as a man's pocket watch and a women's purse watch as well as a portable table clock. A number of models came with luminous hands and numbers so that the they could be seen in the dark. The Carr was terminated in the year 1934 and cost around at $55 (~ $1400 at present).
Gruen Curvex Watches
The Curvex, released in 1935, was available as the Curvex Governor for men and the Curvex Queen (1936) for women. It is the most famous of the Gruen vintage watches and was the flagship watch until the late 1940s. The watch was produced until 1954.
The unique feature of the Curvex was not only that they were curved but more so that the movement inside was also curved. These watches used a patented movement (1,855,952) in which the gears were configured in a curved arrangement. Other curved watches of the 1930s had to use smaller movements that were less accurate and more fragile.
Each and every real men's Curvex watches were Precision grade and used any one of the four movements listed at the end. As a matter of fact, what makes these watches elite and Curvex, is the movement itself. The four movements which are possible to be used are; 1935- caliber 311 which is a long, thin movement; 1937- caliber 330- which is a long, thin and a curved movement; 1940- caliber 440- which is a short, square/oval movement and finally; 1948- caliber 370- which is a short and a wide movement (Curvametric).
Gruen Ristside Watches
The Ristside watches, pronounced as wrist side, were released in 1937 and were designed to be worn on the side of the wrist in line with the thumb. These designs of watches were extensively beloved by the collectors but were very rare as Gruen did not wish to sell many. There is a possibility that a few collectors would try to sell any watch which has hinged lugs as a Ristside. Except Fraternity (mentioned below) and another one similar model all the Ristsides are rectangular in shape and have curved cases.
The Curvex-Ristside watches are components of not only the Curvex family but also the Ristside family of Gruen vintage watches. The movement 330 that is mentioned above was the primary movement used in three different watches named, The Curvex Coronet, Curvex Lord and the Curvex admiral. The Curvex-Ristside Fraternity of watches comprised of hinged lugs and utilized the 440 movement.
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