Curta Calculator Type II , in very good condition. onco in Randburg, Gauteng for sale

The Last pic is this Curta's profile as an original product and shows it's listing of authentication. Go to (http://www.curtamania.com/curta/code/type_and_age_of_your_curta.php) and see this one there. I have also done the reqiured calculation test to see that it work as it should. Below is some interesting info on the Curta.
The Curta is a small, hand-cranked digital mechanical calculator introduced by Curt Herzstark in 1948. It can be used to perform addition, subtraction, multiplication, division, and (with more difficulty) square roots and other operations. It has an extremely compact design: a small cylinder that fits in the palm of the hand. Curtas were considered the best portable calculators available until they were displaced by electronic calculators in the 1970s.
The Curta was popular among contestants in sports car rallies during the 1960s, 1970s and into the 1980s. Even after the introduction of the electronic calculator for other purposes, they were used in time-speed-distance (TSD) rallies to aid in computation of times to checkpoints, distances off-course and so on, since the early electronic calculators did not fare well with the bounces and jolts of rally racing.
The Curta was also favored by both commercial and general-aviation pilots, before the advent of electronic calculators, because of both its precision and the user's ability to confirm the accuracy of his or her manipulations via the revolution counter.
aviation motor racing retro wwII world war 2 science maths engineer flight collector classic museum track marshall calibrate sextant yacht compass gps architect surveyor space watch watchmaker movement clock tag rotary omega steampunk