Sutronic Chronograph – Valjoux 7733 – 17 Jewels – Black Dial – 1970s A striking vintage Sutronic mechanical chronograph from the 1970s, powered by the celebrated Swiss Valjoux 7733 manual-winding chronograph movement. The watch has a strong motorsport-inspired appearance, with a large black dial, contrasting white scales, two recessed chronograph registers and distinctive yellow chronograph hands. The outer tachymeter-style scale and cushion-shaped case give the watch the unmistakable character of 1970s sports chronographs. Comparable Sutronic chronographs with this same black/yellow configuration are documented with the Valjoux 7733 and attributed to the 1970s. uhrforum.de Technical Details Brand: Sutronic Type: Vintage mechanical chronograph Case material: Base metal / coated case with stainless steel back Case size: Approx. 41 × 44 mm Glass: Acrylic Dial: Black dial with white scales and yellow chronograph accents Movement: Swiss mechanical, manual winding Calibre: Valjoux 7733 Jewels: 17 jewels Functions: Hours, minutes, small seconds, chronograph Chronograph: Two-register configuration Shock protection: Incabloc Case back: Stainless steel, marked Swiss Made, Antimagnetic, Incabloc, 3 ATM Water resistance: Not tested for water Strap: Generic leather strap, approx. 20–21 cm Box: Generic box included Condition: Grade B Condition Report This Sutronic chronograph is presented in Grade B vintage condition, showing visible signs of age and use. The case displays scratches, marks and significant wear to the original dark coating. This wear is clearly visible in the photographs and contributes to the authentic vintage character of the watch. The black dial is well preserved overall, retaining its highly attractive contrasting white printing and characteristic yellow chronograph hands. The acrylic crystal shows signs of normal use. The stainless-steel case back shows scratches and opening marks consistent with age and previous maintenance. The watch is fitted with a later generic leather strap. Water resistance has not been tested and is not guaranteed, irrespective of the original 3 ATM marking. Please study all photos carefully, as they are part of the description and show the actual condition of the item. Story & Heritage The most important feature of this Sutronic is hidden inside the case: the Valjoux 7733, one of the emblematic Swiss hand-wound chronograph movements of the late 1960s and 1970s. The Valjoux 7733 became widely used by numerous European watch manufacturers and is closely associated with the golden era of affordable mechanical sports chronographs. Its traditional architecture and two-register configuration have made watches equipped with this calibre increasingly interesting to vintage chronograph collectors. Period Sutronic chronographs equipped with the Valjoux 7733 are documented, including examples with the characteristic black case, black dial and yellow chronograph hands seen on this watch. uhrforum.de The combination of the large cushion-shaped case, densely graduated racing-style dial, bright yellow chronograph accents and genuine Swiss mechanical movement captures the bold aesthetic of 1970s motorsport chronographs. A characterful vintage chronograph for collectors looking for a manual-winding Valjoux 7733, with strong 1970s design and an increasingly uncommon Sutronic signature. Internal Reference Number - FLO-138