Up until the start of the 20th century, though, the pocket watch remained predominant for men with the wristwatch considered feminine and unmanly. In men's fashions, pocket watches began to be superseded by wristwatches around the time of World War I, when officers in the field began to appreciate that a watch worn on the wrist was more easily accessed than one kept in a pocket. A watch of transitional design, combining features of pocket watches and modern wristwatches, was called trench watch or "wristlet". However, pocket watches continued to be widely used in railroading even as their popularity declined elsewhere. The use of pocket watches in a professional environment came to an ultimate end in approximately 1943. The Royal Navy of the British military distributed to their sailors Waltham pocket watches, which were nine jewel movements, with black dials, and numbers coated with radium for visibility in the dark, in anticipation of the eventual D-Day invasion. For a few years in the late 1970s and 1980s three-piece suits for men returned to fashion, and this led to small resurgence in pocket watches, as some men actually used the vest pocket for its original purpose. Since then, some watch companies continue to make pocket watches. As vests have long since fallen out of fashion (in the US) as part of formal business wear, the only available location for carrying a watch is in a trouser pocket. The more recent advent of mobile phones and other gadgets that are worn on the waist has diminished the appeal of carrying an additional item in the same location, especially as such pocketable gadgets usually have timekeeping functionality themselves. In some countries a gift of a gold-cased pocket watch is traditionally awarded to an employee upon their retirement. The pocketwatch has regained popularity in the steampunk subcultural movement embracing the arts and fashions of the Victorian era, during which pocketwatches were nearly ubiquitous.