This is a 33mm. Sterling silver WW1 trench watch dating to pre-1920. The name MARCONI is a registered name used by ROLEX-Hans Wilsdorf (ROLEX founder) chose this name due to the fame of Gugliemo Marconi, who was the first to utilize radio waves during this era. These MARCONI movements were finished the same as the ROLEX branded versions. The Sterling silver original hinged Wilsdorf Davis case (signed W&D) is also RpOLEX produced. The original porcelain dial and with restored lume on the numerals and cathedral hands look fantastic. These dials are (correctly) not signed. The proper large onion winding crown is installed.