hi OF, I had a question I've been trying and failing to answer - for the modern line of the Breguet Type XX Transatlantique (in steel), when did Breguet transition from tritium to luminova? Also other than patina, does anyone know of any other defining features of the older models? Current the only difference I can see are the hour numerals (see photos below). Looking at this watch as a short-term grail, I would love to grab a faded tritium dial if possible for the patina... but I can't seem to find an answer anywhere on google! Thanks! Luminova: Tritium: