This is the SD1903 which pays tribute to the Zenith Pilot watch which commemorates the Wright Brothers' first flight and was a limited edition of 1903 pieces.This is lovely looking watch with real presence and benefits from the following spec:
 
2021 Brand New model
Sapphire Crystal Glass
NH35 Automatic Movement
200m Water Resistance
Screwdown Crown
Screwback Case
Stainless Steel Case
Extra Rubber strap
Hacking Movement
C3 Luminova on the face
Lug Width - 22mm
Case Diameter - 46.5mm
Lug to Lug - 54mm
Case Thickness - 14mm
Weight - 180g
Hard Presentation Box and warranty card
 
Overall the SD1903 is a superb watch for the money. It is reliable, hard-wearing and looks fantastic. It is a watch that constantly gets positive comments from owners and admirers and definitely makes the wearer stand out from the crowd.