IWC 3782 Aquatimer Chronograph Cousteau Divers, 378201, IW378201, Tribute to Calypso (original wood on the back of case), limited edition to 2500 pieces, brushed stainless steel case on a blue rubber strap, automatic movement, day, date, mechanical rotating inner bezel, blue dial, small seconds at 9, luminescent hands and hour indicators, 44 hour power reserve, sapphire crystal, water resistant to 120 meters, diameter: 44mm, thickness: 14.9mm, , Like New with box and papers.

This is a stainless steel IWC Aquatimer Chronograph Cousteau Divers Tribute to Calypso 378201. It has a blue rubber composite strap with a double deployment buckle, and a scratch resistant sapphire crystal with anti-reflective coatings. It has a screw-down winding crown, a crown that turns the rotating inner bezel for setting and tracking the dive times at 4 o'clock, and there is a round chronograph push button at 2 o'clock. It has a screw-down exhibition sapphire display case back engraved around the perimeter with "ORIGINAL WOOD – TRIBUTE TO CALYPSO," and visible through the sapphire crystal is a wooden disc harvested from the interior of the Cousteau research vessel, with an inlaid silhouette of the ship in stainless steel. The 44mm diameter solid three-body case, screwed straight lugs, and flat bezel, are polished/brushed. The dial is midnight blue with luminous steel baton hands, luminous baton hour indices around, and a center sweep steel chronograph hand with an orange arrow tip. It has a luminous minute/one-fifth second scale, and an outer 60-minute dive time rotating bezel with luminous Arabic numerals every 5 minutes, and a silver 15-minute warning segment. There is a perimeter 12-hour chapter ring with luminous Arabic numerals, and twin rectangular day/date aperture window are at 3 o'clock. There are three black subsidiary dials with luminous Arabic numeral markers, including a running small seconds register at 9 o'clock, a 12-hour chronograph totalizer with an orange hand at 6 o'clock, and there is a 30-minute indicator with an orange hand at 12 o'clock. It has a 44-hour power reserve at full wind, and it's water resistant to 120 meters/393 feet. The 14.9mm thick case, dial, and movement are all signed.

This IWC Aquatimer Chronograph Cousteau Divers Tribute to Calypso 378201 has a mechanical automatic self-winding caliber 79320 movement. It's rhodium-plated, and constructed with 25 jewels, a shock absorber device, and a straight-line lever escapement. It has a monometallic balance, and a self-compensating flat balance spring.

The IWC Aquatimer Chronograph Cousteau Divers Tribute to Calypso 378201 was produced in a limited edition of 2500 examples in 2005.