IWC
IWC Ingenieur Perpetual Calendar Digital Date-Month IW381802
The IWC Ingenieur Perpetual Calendar Digital Date-Month (reference IW381802) is a 45 mm titanium watch with a grey dial. It runs on the automatic caliber 89801 with a 68-hour power reserve and is water resistant to 120 m. It is no longer in production.
Specifications
Case
- Reference
- IW381802
- Collection
- Ingenieur
- Case size
- 45 mm
- Thickness
- 17.4 mm
- Case material
- Titanium
- Case shape
- Round
- Crystal
- Sapphire
- Water resistance
- 120 m
- Bracelet / strap
- Leather strap
Dial and bezel
- Dial
- Grey
Movement
- Movement
- Automatic
- Caliber
- 89801
- Power reserve
- 68 hours
- Frequency
- 28,800 vph
- Jewels
- 51
- Functions
- Perpetual calendar, Digital date and month, Flyback chronograph
Production
- Production
- Discontinued
Dial versions
This reference was made with these dials and finishes.
IW381802 Grey
Grey
How it compares within the Ingenieur family
Side by side with other references in the same collection, from the catalog.
| Reference | Size | Material | Dial | Caliber | Years |
|---|---|---|---|---|---|
| IW381802 (This watch) | 45 mm | Titanium | Grey | 89801 | — |
| IW324907 | 35.1 mm | Stainless steel | Blue | 47110 | 2026– |
| IW328901 | 40 mm | Stainless steel | Black | 32111 | 2023– |
| IW328902 | 40 mm | Stainless steel | Silver | 32111 | 2023– |
| IW328903 | 40 mm | Stainless steel | Aqua blue | 32111 | 2023– |
| IW328907 | 40 mm | Stainless steel | Blue | 32111 | 2023– |
| IW328908 | 40 mm | Stainless steel | Green | 32111 | 2023– |
| IW338902 | 42 mm | Ceramic (dark olive green) | Green | 82110 | — |
| IW345901 | 41.6 mm | 18k 5N gold | Green | 82905 | — |
About the Ingenieur family
The Ingenieur was introduced in 1955 with ref. 666, an automatic watch protected against magnetic fields by a soft-iron inner case. In 1976 Gérald Genta redesigned it as the Ingenieur SL ref. 1832, with an integrated bracelet and a bezel with five recesses.
In 2023 IWC returned to the Genta design with the Ingenieur Automatic 40, ref. IW328901, with caliber 32111 and a grid-patterned dial. The catalog also lists earlier models with calibers such as 80110 and 30110 and ceramic versions. Dealers separate the generations by case design and reference and check the bracelet.
Quick answers
- What size is the IWC Ingenieur Perpetual Calendar Digital Date-Month IW381802?
- The IWC Ingenieur Perpetual Calendar Digital Date-Month IW381802 has a 45 mm case, 17.4 mm thick.
- What movement does the IWC Ingenieur Perpetual Calendar Digital Date-Month IW381802 use?
- It uses the automatic caliber 89801, with a 68-hour power reserve.
- How water resistant is the IWC Ingenieur Perpetual Calendar Digital Date-Month IW381802?
- It is water resistant to 120 metres.
- Is the IWC Ingenieur Perpetual Calendar Digital Date-Month IW381802 still in production?
- Discontinued.
- What is the IWC Ingenieur Perpetual Calendar Digital Date-Month IW381802 made of?
- The case is titanium. Bracelet or strap: Leather strap.
Catalog facts checked October 2026.