The Rolex Explorer is a highly sought after model with a number of notable references; the 1016, the 1655 Orange Hand or Freccione and the 16570. This particular Explorer is a transitional reference 16550, which came between the 1655 and the 16570. These 16550s came with a black and white dial, but due to a mistake in the production of the early series of the white dials, the white became more cream. This, along with the aging of the lume in the hour makers, makes for a beautiful, low contrast dial. These watches are quite rare and difficult to come by, so get in touch with any questions before this one slips away!