1 / 10Specifications
A concise reference view of the case, dial, bracelet and movement details buyers compare first.
Case
| Diameter | 42 mm |
|---|---|
| Thickness | 14.4 mm |
| Lug width | 22 mm |
| Material | Stainless steel |
| Caseback | See-Through |
| Crystal | Sapphire |
| Water resistance | 3 bar / 30 m |
| Water Resistance Category | Splash |
Functions and complications
| Complications | Flyback |
|---|---|
| Complication count | 1 |
| Flyback | Yes |
Reference details
| Gender | Men's |
|---|---|
| Production status | Discontinued |
| Origin | Switzerland |
| Warranty | 8 years |
| Size category | Large |
| Component count | 299 |
Dial and bracelet
| Dial | Grey |
|---|---|
| Display | Analog |
| Date | Yes |
| Calendar | Simple |
| Bracelet | Leather |
| Bracelet material | Black alligator leather strap by Santoni |
| Strap material | Alligator Leather |
Movement
| Calibre | IWC Calibre 89361 |
|---|---|
| Calibre family | 89xxx |
| Movement | automatic |
| Power reserve | 68 hours |
| Frequency | 28,800 vph |
| Jewels | 38 jewels |
| Stop Seconds | Yes |
| In House Movement | Yes |
Additional details
| Buckle Width Mm | 18 |
|---|
Recent price movement
Tracking 7 daily market snapshots since July 2026. The solid line shows the median delivered estimate and the dashed line tracks the lowest available offer; the full-set plot shows pricing from qualifying offers listed with both original box and original papers.
About this reference
IW390404 gives the Portugieser a more expansive chronograph presence through its 42 mm stainless-steel case and grey dial. The black Santoni alligator-leather strap adds a tailored finish, allowing the flyback chronograph and date display to feel integrated rather than overly technical. A see-through back makes the watch's mechanical depth visible, while the 30-metre water resistance preserves its refined, dress-oriented character.
Calibre 89361 is an in-house automatic movement with flyback chronograph, small seconds and date. Its 30 mm, 7.5 mm-high architecture contains 299 components and 38 jewels, with 68 hours of power reserve from a single barrel. The 4 Hz frequency gives the movement a modern rhythm, and the 14.4 mm case provides room for the substantial complication without losing the Portugieser's formal balance.










