Production started in 1936 and closed down in 1970. From the beginning there was only one outfit No. II (2), but soon after came also No. 1, 3 and 4 in the first generation. Parts and contents changed and there are 5 different generations of TEKNIK over the years, named 0-4 (by collectors). Appr. years: gen. 0 = 1936-40, gen. 1 = 1940-45, gen. 2 = 1945-50, gen. 3 = 1950-56 and gen. 4 = 1956-70. The most common is the latest generaton no. 4.