A replica Pilot's Automatic 46 is a 46 mm pilot-style watch with an automatic movement, built to match the proportions of the IWC Big Pilot's Watch. The number 46 is the case diameter in millimeters, not a model number. That diameter comes with a large onion crown, a matte black dial with high-contrast numerals, and, on the original, a soft-iron inner cage that shields the movement from magnetism. Most replicas keep the diameter and dial layout and drop the inner cage, which matters when you compare weight and thickness.
What Buyers Mean by "46"
Sellers list these watches as 46 mm, but measured cases often land between 45.8 mm and 46.5 mm. The original Big Pilot sits at roughly 46.2 mm across without the crown. Ask for a caliper photo of the case at 3 and 9 o'clock. If the seller only quotes the diameter with the crown included, the case is smaller than advertised.
Prerequisites
- A soft tape measure and a photo of your wrist next to a credit card for scale
- Digital calipers, or a seller willing to photograph the case with calipers
- A 10x loupe for dial printing and hand finishing
- Access to a timegrapher, or a local watchmaker who will run one
- A budget range in writing before you contact a wholesaler
How to Evaluate One
- Measure your wrist circumference and record the flat width across the top of your wrist.
- Ask the seller for the exact case diameter without the crown and compare it to 46 mm.
- Request the movement name, jewel count, and beat rate in writing.
- Ask for a straight-on dial photo at 12 inches so you can judge numeral spacing and logo position.
- Inspect the crown photo for an onion profile that grips without overhang past the lugs.
- Confirm the crystal type and whether it has an inner anti-reflective coating.
- Request a lume photo taken after 30 seconds under a UV light in a dark room.
- Have the movement timed in three positions: dial up, crown up, and crown down.
- Check the strap width at the lugs, which should measure 22 mm on a 46 mm pilot case.
Movement Options
- Miyota 9015: 24 jewels, 28,800 vibrations per hour, about 42 hours of reserve. Thin, reliable, common in mid-tier builds.
- ETA 2824-2 or a clone: 28,800 vph, roughly 38 hours of reserve. Widely serviceable.
- Asian 2836-2: 28,800 vph with a day and date option. Louder rotor, easy parts supply.
- Decorated automatic: engraved bridges and blued screws added for looks. Cosmetic only, no effect on rate.
Case, Crown, and Crystal Checks
A 46 mm pilot watch feels top-heavy when the case back is flat and the lugs are short. Look for a case back with a slight curve and lugs at least 50 mm from tip to tip. The crown should be screw-down on any build claiming water resistance past 50 meters. Sapphire with a single inner coating reads blacker at an angle than mineral glass, which shows a grey haze under office light. Run a fingernail across the bezel edge. A sharp lip catches skin and signals a cheap polish.
Wrist Fit and Strap Choice
At 46 mm, the watch suits wrists from about 7.25 inches upward. Below that, the lugs will overhang the wrist edge and the watch will slide. A thick vintage-style calf strap, 22 mm wide and 4 mm at the lugs, balances the case better than a thin alligator strap. Keep the buckle in line with the case center when you close the strap, not offset toward your thumb.
Final Verification
Before payment, confirm four numbers: case diameter, lug-to-lug length, movement beat rate, and power reserve. Run the watch for a full wind cycle and note how many hours it holds. A pilot watch that loses more than 15 seconds a day across three positions needs regulation or a different unit. If the seller cannot supply those four numbers, treat the listing as unverified.