The new Engineer Master II Diver Chronometer is a stainless-steel watch with a bi-directional rotating sapphire inner bezel with micro gas tubes for night reading capability. This model has rainbow micro gas tubes, there is a classic edition, DM2280A-P1C-BK, available too. This watch includes a mu-metal shield and Amortiser® patented anti-shock system (5,000Gs shock resistance).
I found Iguana really friendly, helpful and efficient to both buy the pen and when I had a query - very quick to respond. The pen is gorgeous and I’m now using it every day.