Lot Essay
Due to the difficulty in soldering stainless steel at that time, the lugs on this model have been machined in such a way that they "click" into position in the rim of the case and are held in place by the bezel. One of the difficulties in working with the early stainless steel was that no-one had yet developed a successful method of soldering the material. This restricted the case designers to simple shapes, either rectangular or round, ones that could be either stamped or machined from solid. This very rare form of case construction was an attempt by Rolex case makers to solve the problem.