The case back is entirely made in titanium, it shows the planet with the continents and oceans along with the names of the cities, representing each of the 24 time zones.
Also available with a stainless steel bracelet and double folding clasp.
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.