IWC Portuguese Perpetual Calendar Watch

Case Size: 41mm × 13mm
Case: 316L stainless steel
Movement: Modified Grand Seiko‑based 52610 movement
Functions: Perpetual calendar, year display at 8 o’clock, date at 3 o’clock, month at 6 o’clock, weekday at 9 o’clock. Year adjustable via hidden push‑button, reversible year adjustment. Date bidirectional adjustment at second crown position. Month adjusted via 8‑o’clock hidden push‑button. Weekday adjusted via hands.
Crystal: Arched scratch‑resistant sapphire crystal