Sinn 103 ST OU Chronograph is a must-have for any watch enthusiast. 

Inspired by 1930s spiral tachymeter chronograph dial.

Completed with original strap, buckle, box and paper including guaranteed blank card.

With its mechanical automatc movement, polished case finish, and original two-piece leather strap, it is both functional and stylish. 

The 41mm case size, 20mm lug width, and chronograph features make it perfect for everyday wear or special occasions.

Not tested for accuracy and water resistance.

Ship worldwide.