IWC
IWC Aquatimer Perpetual Calendar Digital Date-Month IW379401
The IWC Aquatimer Perpetual Calendar Digital Date-Month (reference IW379401) is a 49 mm 18k 5N gold watch with a black dial. It runs on the automatic caliber 89801 with a 68-hour power reserve and is water resistant to 100 m. It is no longer in production.
Specifications
Case
- Reference
- IW379401
- Collection
- Aquatimer
- Case size
- 49 mm
- Thickness
- 19.4 mm
- Case material
- 18k 5N gold
- Case shape
- Round
- Crystal
- Sapphire
- Water resistance
- 100 m
- Bracelet / strap
- Rubber strap
Dial and bezel
- Dial
- Black
Movement
- Movement
- Automatic
- Caliber
- 89801
- Power reserve
- 68 hours
- Frequency
- 28,800 vph
- Jewels
- 51
- Functions
- Perpetual calendar, Digital date and month, Flyback chronograph, Rotating bezel (SafeDive)
Production
- Production
- Discontinued
Dial versions
This reference was made with these dials and finishes.
IW379401 Black
Black
How it compares within the Aquatimer family
Side by side with other references in the same collection, from the catalog.
| Reference | Size | Material | Dial | Caliber | Years |
|---|---|---|---|---|---|
| IW379401 (This watch) | 49 mm | 18k 5N gold | Black | 89801 | — |
| IW328801 | 42 mm | Stainless steel | Blue | 32111 | — |
| IW328802 | 42 mm | Stainless steel | Black | 32111 | — |
| IW329001 | 42 mm | Stainless steel | Black | 30120 | 2014–2022 |
| IW329002 | 42 mm | Stainless steel | Black | 30120 | 2014–2022 |
| IW329005 | 42 mm | Stainless steel | Blue | 30120 | — |
| IW356801 | 44 mm | Stainless steel | Black | 30110 | 2009–2011 |
| IW376705 | 44 mm | Rubber-coated stainless steel | Black | 79320 | 2009–2014 |
| IW376805 | 44 mm | Stainless steel | Blue | 79320 | — |
About the Aquatimer family
The Aquatimer was introduced in 1967 as IWC's first dive watch, with an internal rotating bezel and water resistance of 200 metres. Later generations moved to an external bezel, and from 2014 IWC used a system that combines an external bezel with an internal one for safer timing.
The catalog includes automatics and chronographs with calibers such as the 30110, 32111 and 79320, in stainless steel, rubber-coated steel, 18k gold and IWC's Ceratanium. Dealers identify the generation and material from the reference and check the bezel action, strap and papers.
Quick answers
- What size is the IWC Aquatimer Perpetual Calendar Digital Date-Month IW379401?
- The IWC Aquatimer Perpetual Calendar Digital Date-Month IW379401 has a 49 mm case, 19.4 mm thick.
- What movement does the IWC Aquatimer Perpetual Calendar Digital Date-Month IW379401 use?
- It uses the automatic caliber 89801, with a 68-hour power reserve.
- How water resistant is the IWC Aquatimer Perpetual Calendar Digital Date-Month IW379401?
- It is water resistant to 100 metres.
- Is the IWC Aquatimer Perpetual Calendar Digital Date-Month IW379401 still in production?
- Discontinued.
- What is the IWC Aquatimer Perpetual Calendar Digital Date-Month IW379401 made of?
- The case is 18k 5N gold. Bracelet or strap: Rubber strap.
Catalog facts checked October 2026.