This special Sub from 1968 has a Mark II dial. An important detail to note is that the meter indication (200m) is placed in front of the foot indication (660ft). This only applies to the Mark I, Mark II, and Mark III dials. From Mark IV, the foot indication was placed in front of the meter. Another distinctive detail to note is the open style of the track "6s" in "660ft".
2. Rolex Red Submariner ref. 1680 Mark IV replica at watchessaleoutlet.com
This specific Red Submariner ref. One thousand six hundred eighty dates from 1969/1970 and this time has the Mark IV dial. The Mark IV dial was the first ref. 1680 to place the foot indication (660ft) in front of the meter indication (200m), as shown in this example. The Mark IV dial is also characterized by the open "6s" in the base display.
3. Rolex Red Submariner ref. 1680 Mark VI
Here we have a Red Sub ref. 1680 from 1973/1974 with a Mark VI dial. The Mark VI dials of the ref. 1680 is actually the last of the red script versions, as the Mark VII and Mark VIII dials are written entirely in white. Aside from the red "SUBMARINER", the other distinguishing details of the Mark VI dial include the foot indicator (660 ft) placed in front of the meter reading (200 m) and the closed style "6s" in the foot indicator.
To the untrained eye, these dial details would likely go unnoticed. But for a Rolex collector, it's these little details that keep things exciting. Not only is it an opportunity to learn a little bit more about the history of faux Rolex Watch and their models, but it can also be an exciting challenge to find the exact watch face you are looking for. Plus, having that little mystery that can only be deciphered by other Rolex enthusiasts is pretty sweet too—unanswered Complaints about Rolex Replica Watch Exposed.