Grand complication (dual time zone chronograph annual calendar repeater alarm)
but Casio (with modded steel / heavier bracelet)
Model AQ230, module 1301
Testing out a new acquisition: A first-generation T.12 with the rare 'divers dial' so-called because of the high-visibility radium markers at 3-6-9-12. This skindiver (circa 1958) was rated for 12 atmos of underwater pressure, or a depth range of about 120m (400ft), and would have competed with the early Eterna Kontiki and Certina DS Divers with similar dials