Maybe their NY0040 series of dive watches as well, although it's a bit of a stretch.
Citizen suffers from a lack of "iconic" models that they can reissue and make new versions of in perpetuity, like Seiko's Alpinist, SKX, King Seiko, Turtle, 6138 chronographs, 7548 divers, Tuna, 7a28 quartz chronos and so on. The only "iconic" Citizen models I can name off the top of my head are the Aqualand and possibly their 70's bullhead chronograph.
Maybe their NY0040 series of dive watches as well, although it's a bit of a stretch.
And I’d add the Citizen Fugu to this list: it’s got a distinct design, decades of history (made in perpetuity), the requisite military connection (issued to Italy’s Navy SEALs) if that’s your thing, plus ample new and special editions. And let’s not forget a cool nickname, Fugu, after the lethally-poisonous puffer fish.