Welcome to my Top Swiss Chronograph Wristwatches Boutique: With its passion for innovation and technical inventiveness, IWC Schaffhausen has established an international reputation. Since 1868, manufacturers have been creating masterpieces of haute horlogerie. IWC mechanical timepieces are handcrafted with meticulous attention to detail, combine precision engineering with extraordinary timeless design, bringing finest technology and unique emotions to the wrist. The Ingenieur brand first appeared in 1954 and has been applied to watches designed for scientific, technical, and exploration usage. Most Ingenieur watches feature water resistance, anti-magnetic capabilities, and precise timing. In this way, the Ingenieur is similar to the Rolex Milgauss and Rolex Explorer. From the beginning, IWC Ingenieur watches have features a logo with “INGENIEUR” in capital letters above a lightning bolt from top left to bottom right. The Ingenieur line was refreshed in 2005: IWC began launching larger and sportier pieces. The most important was the Ref. 5005 "Big" Ingenieur with its massive 45.5 mm case and 8-day Cal. 51113. This was joined by offered "Big" Chronograph, Ref. 3784, with the in-house Cal. 89361. These fit the “big watch” trend of the time and began moving the line away from Genta's 1970's design. 2009's Ref. 3236 "Mission Earth" was even larger, with a bulky case but no extra complications. Historic and modern Ingenieur watches have traditional watch cases with an integrated bezel. Movement: - self-winding in-house calibre Cal. 89361 - base: in-house calibre Cal. 89360 - 68 hours power-reserve - 38 jewels - frequency: 28,800Vph Case: - 316L stainless steel - polished/fine brushed - 45mm excl. crown, 49,6mm incl. - thickness: 14,8mm - unique No: 3*******5 (for buyer only), best proof of authenticity Flat sapphire crystal, anti-reflective Bezel: - 316L stainless steel, traditional, with 5 holes - fixed, polished/brushed Case-back: see-through, sapphire crystal Crown: - polished stainless steel - push/pull - screwed down - raised logo shield Dial: - black, cotes de Paris circle in the middle - polished luminescent hands and hour batons - minute markers round the inner rim - tachymeter round the outer rim - chronograph central seconds hand - two silver chronograph sub-dials: hour and minute counters are combined in the 12:00 o'clock totalizer small-seconds at 06:00 o'clock Strap: - authentic IWC black leather - length: ca. 22cm incl. wristwatch itself - width: 28mm by lugs, 18mm by clasp Clasp: - folding - brushed/polished stainless steel with IWC logo Water-resistant: 60meter/6Bar, not useful for swimming and diving Weight: 161 grams General professional pre-sale service was made in January 2024: the watch is keeping good time and working perfectly. Original IWC watch-box is not in such impeccable condition as the watch itself; this is, unfortunately, a typical problem for some black IWC boxes: if not stored correctly, they “sweat” slightly. High recognition value. Distinctive design. Excellent condition, never worn: the wristwatch comes from luxury watch-shop showcase. My personal authenticity and quality warranty: you will get warranty card (as pictured), fully completed and signed on the back. Insured, registered shipping worldwide with DHL Express: it’s not cheap, and yet fast and reliable, two days in Europe, three days worldwide. What you see in my pics is what you get. NO EXTRA COSTS for EU Buyers!