The Citizen AT2590-59 L combines modern solar technology with the benefits of Super Titanium™. The material is particularly durable; it is five times harder than stainless steel whilst at the same time being around 40% lighter. Inside the case is the in-house calibre H504 with Eco-Drive technology, which converts light into energy and provides a power reserve of up to 180 days. The solar cells, which are discreetly integrated into the totalisers, ensure a clean, uncluttered design, whilst the accuracy of ±15 seconds per month guarantees reliable timekeeping.