this is the sought after tritium version of the first aquanaut jumbo in steel, only produced from 1997 for two years until they switched the lume to superluminova. our example from 1999 comes with the black pp rubberband that will fit wrists up to 18mm size, an extract of the archives and also a patek leather travel box. the 38mm case is carrying the 315sc movement with matching numbers and is engraved with the “seal of geneva”. it winds smoothly and runs absolutely exact, not being in the need for a service soon. This is a rare chance to catch one of the early jumbo aquanauts with beautiful tritium aptina in all original condition.