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 classic micro gas tubes, there is a rainbow edition, DM2280A-S1C-BKR, 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.