The Tower 51 is a conventional fixed lens rangefinder produced by Iloca Kamera-Werk in Hamburg, Germany as a direct variant of the Iloca Rapid-B and sold by Chicago-based department store and mail order giant Sears, Roebuck and Co. under their Tower brand. Over the years, Sears sold a wide variety of rebranded cameras produced by different manufacturers such as the Tower 39 Automatic (made by Mamiya) and the 2.8 / Easi-Load (produced by Ricoh).
In 1961, Canon—then an upmarket camera company—shocked the industry by debuting the Canonet line, a series of modestly-priced compact rangefinders. The very first Canonet model completely sold out in just two hours while worldwide sales hit the one million mark in a mere two and a half years, an auspicious beginning for what would be a wildly popular line of cameras that would span over two decades. The Canon Canonet QL17 G-III is the final high-end model of the Canonet series.
