This model comes with two straps, one in leather and one in rubber. The watch pays tribute to the first operational nuclear submarine ever to have been made. The illumination of the watch does not require any external power source as it contains 12 tritium tubes mounted vertically on the dial and 3 tubes in the hour and minute hands. It contains a helium release valve, useful for deep-sea divers.
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.