• Item Numbers: IW377704 (bracelet version), IW377701 (leather‑strap version)

  Case Diameter: 43 mm

  Case Thickness: 15 mm

  Case Material: Stainless‑steel

  Dial Colour: Black

  Dial Shape: Round

  Crystal: Domed sapphire‑crystal glass with double‑sided anti‑reflective coating

  Crown Material: Screw‑down stainless‑steel crown

  Strap Colour: Black

  Strap Material: Alligator leather

  Buckle Material: Stainless‑steel

  Water‑resistance: 60‑metre

  Just like the genuine watch, the replica adopts a 43‑millimetre case size. Paired with the silver stainless‑steel bracelet and three‑crown layout, it delivers an outstanding‑looking appearance.

Both the proportions and lengths of hands on the ZF‑made watch precisely match those of the authentic timepiece. It is worth noting that the minute hand and central chronograph seconds hand adopt a curved profile. The genuine watch also features bent hands. The domed crystal necessitates this curved‑hand design to prevent the hands from scraping against the glass.

Furthermore, you can spot curved hands on plenty of vintage dress‑style watches from decades ago. Renowned old‑school watchmakers including Jaeger‑LeCoultre, Glashütte Original and Girard‑Perregaux are quite fond of this bent‑hand configuration.

The circular tracks and markings on the sub‑dials are sharply defined. The dial surface boasts excellent three‑dimensional depth, and the peripheral scales are crafted with meticulous attention to detail, matching those of the authentic watch perfectly.

Now moving on to the bracelet section. The replica achieves exquisite finishes for both polished and brushed surfaces, striving for maximum consistency with the genuine watch. Both timepieces come with silver‑toned stainless‑steel bracelets that exude rugged masculine charm. Its bracelet removal system is compatible with that of Mark XVII and other models, adopting a screw‑free quick‑release structure.

再看底盖部分，是圆形螺纹打磨的圈口

扣子的做工同样OK，扣子是磨砂，穿过皮带的“针扣”是抛光设计

下面来看一些整体实拍效果：

# Precautions for the 7750 Movement 1. Do not adjust the watch time between 9 p.m. and 3 a.m., especially the date and weekday. During this period, the slow‑jump gear is engaged for the automatic date‑changing process. Manual quick‑jump operation at this time may cause gear jamming and movement breakdown. The optimal hours for time calibration are 10 a.m. to 2 p.m. 2. Avoid frequent use of the chronograph function, and this rule applies to both genuine and replica watches. Activating the chronograph will affect time accuracy for both Shanghai‑made and ETA movements. Do not toggle the chronograph on and off repeatedly. Note: every time you start the chronograph, let the central chronograph seconds hand run for 15‑30 seconds before pausing and resetting it to zero. 3. Handle the watch with care. Proper maintenance guarantees stable performance from your timepiece. 4. Pull the crown to the correct gear position before adjusting the date and weekday to prevent gear damage. Apply minimal force and operate slowly; you will get comfortable with the rhythm after practice. The recommended method is to pull the crown to the second position and adjust via the hour hand. 5. When the 7750 automatic‑winding mechanical movement has stayed fully stationary, manually wind it until around eighty‑percent full. Take care not to over‑tighten the crown, as over‑winding may trigger thread slippage and malfunctions. Generally, one‑hour wrist‑wearing for men can generate enough motion to build a 3‑hour power reserve for an automatic watch.