Hey Watchexchange! **TL;DR** This is a bad-ass titanium, tough as nails UTC pilot chronograph. I’ve got a treat for you today. Here’s one that doesn’t pop up too often, and especially on a titanium bracelet. If you’re a watch enthusiast with a soft spot for precision-engineered aviation timepieces, the Sinn Pilot Chronograph 103 Ti UTC TESTAF (103.0791) deserves a permanent spot on your radar—and, perhaps, your wrist. Crafted with Sinn’s uncompromising blend of technical mastery and tool-watch aesthetics, this chronograph isn’t just about telling time; it’s about embodying the spirit of adventure in the skies. With a 41mm diameter and satin-finished surface, the 103 Ti UTC balances boldness with understated elegance. One of the defining features of this chronograph is its UTC functionality—perfect for travelers and pilots managing multiple time zones. Whether you’re charting flight paths or planning cross-continental meetings, this watch keeps you synchronized in style. This isn’t just any aviation watch—it meets the rigorous standards of TESTAF (Technischer Standard Fliegeruhren), ensuring it’s ready for professional pilot use. TESTAF certification verifies that it can handle rapid pressure changes, extreme temperatures, and cockpit-ready readability. The certificate is signed by Dr. Frank Janser of the Flight Laboratory of the Faculty of Aerospace Technology of the Aachen University of Applied Sciences in cooperation with German watch brand Sinn. This is more than just a pretty face—this is precision you can trust at cruising altitude. Water resistance of up to 200 meters (20 bar) and Sinn’s signature Ar-Dehumidifying Technology mean this timepiece doesn’t sweat under pressure. Whether you’re diving deep or flying high, moisture and fogging are the least of your worries. The 103 Ti UTC is powered by a Valjoux 7750 automatic movement, a workhorse known for its reliability, shock resistance, and chronograph accuracy. The 12-hour chronograph function, paired with day and date displays, enhances its functionality while giving a nod to its aviation heritage. Sinn’s reputation for crafting watches that defy obsolescence make the 103 Ti UTC a coveted addition to any collection. For those who appreciate watches that combine heritage with purpose-driven design, this is more than an accessory—it’s a statement of functional luxury. Whether you’re navigating life on the ground or soaring through the skies, the Sinn 103 Ti UTC TESTAF stands as a reliable co-pilot, built for explorers, collectors, and anyone who values precision where it matters most. **Condition:** This watch was not babied. The bezel has numerous scratches. The case and bracelet have scratches too. The OEM leather strap is in fair condition but has a lot of life left. There’s an additional AM strap that’s in rough shape. The service history is unknown but it’s keeping okay time at -13 spd or so. The 30 minute counter doesn’t fully reset to 0 as shown. **Scope of delivery:** This is a full set, double boxed with a 2015 warranty card. It has the booklet and TESTAF certificate. It comes with the OEM leather strap, a Sinn titanium bracelet (a $500 add-on), and an aftermarket leather strap. **Specs:** Reference number: 103.0791 Case size: 41mm Lug-to-lug: 48.1mm Case thickness: 17.6mm Water resistance: 200m **Price:** $1995 shipped to your local FedEx Office hold location **Methods of payment:** Zelle is preferred; Venmo/CashApp/PayPal F&F only with significant transaction history **Trades:** Not at this time. **References:** Hundreds of successful transactions in watch trading. See my eBay account under the same name. Many references in Facebook groups, watch forums, and on WUS. **Timestamp:** https://imgur.com/a/b79PCT2 **Photo album:** https://imgur.com/a/FHc1jtH