The first prototype of the Megaquartz 2400, developed by Omega in collaboration with the Battelle Institute of Geneva, was presented at the Basel Fair in 1970 and was officially introduced in the market in 1974. With its precision of one second a month, around 10 times superior to any other quartz watch, the model was and still is considered one of the most accurate wristwatches in the world. The accuracy results from a specially designed resonator, sealed in a capsule and vibrating at an extraordinary rate of 2,359,296 times a second, awarding the model with the title of "Marine Chronometer". The models are described and illustrated in Marco Richon's Omega Saga, p. 277, and in A Journey Through Time, pp. 201, 202 & 375.