Radiomir 1940 3 Days Acciaio - 47mm



Technical Details

Movement Hand-wound mechanical, Panerai P.3000 calibre, executed entirely by Panerai, 16½ lignes, 5.3 mm thick, 21 jewels, Glucydur® balance, 21,600 alternations/hour. Incabloc® anti-shock device. Power reserve 3 days, two barrels. 162 components.

Functions Hours, minutes, small seconds, date

Case Diameter 47 mm, AISI 316L Polished Steel

Bezel Polished Steel

Back See - through sapphire crystal

Dial Black with luminous Arabic numerals and hour markers. Date at 3 o’clock, seconds at 9 o’clock.

Crystal Sapphire crystal formed of corundum

Water Resistance 10 bar (~100 metres)

Strap Alligator, Antique brown, Ecru, 26/22 MM Standard

* The trademark Velcro® and Coramid® are not property of Officine Panerai.

* The trademark Velcro® and Coramid® are not property of Officine Panerai.

In Depth

THE HISTORIC FASCINATION OF THE RADIOMIR 1940 CASE REVIVES IN THE NEW RADIOMIR 1940 3 DAYS in steel, fitted with the P.3000 calibre, a hand-wound mechanical movement with a power reserve of three days. In the Radiomir 1940 3 Days the essential forms of the Panerai design have been integrated with the technical solutions for an haute horlogerie sports watch, which have influenced the materials chosen and the construction of every detail. The dial, with the small seconds hand at nine o’clock and the date window at three o’clock, has the sandwich structure of two superimposed plates with the luminous material between them, the light of which emerges through the holes in the upper plate corresponding to the hour markers. This type of dial construction was designed by Panerai in the late 1930s to provide greater brightness and legibility. The colour of the dial is black. The case is made of AISI 316L stainless steel, highly resistant to corrosion. The case and bezel have a polished finish. On the back is a large sapphire crystal window through which the P.3000 movement, entirely developed and produced in the Officine Panerai manufacture in Neuchâtel, can be admired. The Radiomir 1940 3 Days is supplied with a black leather strap.



AISI 316L 1.4435 stainless steel is Officine Panerai’s material par excellence since it is highly resistant to corrosion and is hypoallergenic, making it ideal for contact with the skin.

The Panerai watches created for the Italian Navy were made of austenitic stainless steel, a reliable material that was also resistant to the extreme environmental conditions in which the commandos operated. AISI 316L, a specification of the American Iron and Steel Institute, is an austenitic stainless steel alloy with a chromium content of 16–18%, 11–14% nickel and 2–3% molybdenum.

Officine Panerai uses the low-carbon variant of this alloy: the lower carbon content of the steel improves its welding qualities where the metal’s thickness is 6mm or less. The excellent technical qualities of this material make it an essential element of every new Officine Panerai collection.


Panerai watches are produced to very high standards of quality. It is worth remembering that the mechanical parts run 24 hours a day when used, so the watch must undergo regular maintenance to ensure long life and good operation.


Have watch checked periodically for water-resistance by an Authorized Panerai Service Centre and renovate it every two years with regular servicing, or whenever the watch has to be opened. The restoration of water-resistance necessarily involves replacing the seals in order to ensure the maximum water resistance and protection. Where the watch is used in underwater sports activities, it is recommended that it should be checked every year before the underwater activities begin.  


Have the movement of watch checked periodically by an Authorized Panerai Service Centre in order to preserve its perfect operation. If the watch has a tendency to gain or lose time to a significant degree, the movement may need to be overhauled. The movements are designed to withstand temperature variations between -10°C and +60°C (14°F and 140°F). Outside this range of temperatures, operational variations exceeding those set out in the specifications of the movement may be noticed. In addition, there is a risk that the lubricants contained in the movement may deteriorate, resulting in damage to some of its parts. 



To keep the exterior in perfect condition, we recommend washing Panerai watch with soap and warm water, using a soft brush. After this operation, and also after immersion in the sea or a swimming pool, carefully rinse the watch with fresh water. All Panerai watches can be cleaned with a soft, dry cloth. 


 Panerai straps must be washed in warm water and left to dry. It is important not to dry them on a hot surface or expose them to direct sunlight, because the rapid evaporation of the water could damage their shape and quality. After each immersion in the sea or a swimming pool, carefully rinse the strap with fresh water. It is recommended that the strap and the buckle should be replaced by an Authorized Distributor or a Panerai Service Centre, in order to avoid any problems caused by incorrect replacement. Only an Authorized Distributor or Panerai Service Centre can guarantee the use of genuine Panerai straps, properly designed to fit the dimensions of the case and manufactured according to the quality standards of the brand. All alligator leather used by Officine Panerai comes from farms in Louisiana, USA. Officine Panerai’s suppliers have committed to the highest standard of responsibility and have given their assurance that such farms in Louisiana contribute to the stable growth of wild alligators, thus protecting this endangered species. Panerai does not use leather coming from endangered species taken from the wild.