I am looking for advice regarding a Heuer Carrera I purchased this summer. Unfortunately, the model number and serial number have essentially been worn away (from an ill fitting strap I assume), although the very tops of the digits are barely legible. The pictures I took are not the greatest, but the dial is gray, the registers are white and the Tachy ring is blue (and the chrono is a very obvious orange). I have simply never seen this color scheme before, as most of the 1153's I have found always have the colors of the Tachy ring and the registers to match... Any ideas? The crown is signed and the pushers appear to be original. Calibre 11 movement runs great. Thanks in advance!