Atlantic Worldmaster Original – Unitas 6300N 37 mm Stainless Steel Black Dial 1970s Excellent Description A classic of 1970s Swiss watchmaking, the Atlantic Worldmaster Original combines robust construction with the charm of a hand-wound Unitas 6300N calibre (21 jewels). The full-steel case measures a versatile 37 mm, while the deep-black dial and signed crown retain the unmistakable “Worldmaster” identity that has earned the model a loyal following for decades. Highlights Unitas 6300N hand-wound movement – reliable, easy to service, smooth winding action All-stainless-steel case – 37 mm (40 mm including crown) × 10 mm, screw-back, signed inside Original signed crown – crisp logo and precise operation Refinished black dial – clean layout with applied indices and polished hands Plexiglass crystal – period-correct and easily polished if ever needed New brown calf-leather strap – 20 mm, fits wrists up to ~24 cm, silver-tone buckle Excellent overall condition – only minimal signs of careful wear; keeps time well Technical Specifications Details Brand / Model Atlantic Worldmaster Original Production Era 1970 – 1979 Movement Unitas 6300N, hand-wound Jewels 21 Case Material Stainless steel Diameter (ex-crown) 37 mm Diameter (incl. crown) 40 mm Thickness 10 mm Case Back Stainless steel, screw-down, signed Crystal Plexiglass Dial Black, applied indices, polished hands Water Resistance Not pressure-tested (vintage piece) Strap Brown leather, 20 mm, silver buckle Condition Excellent vintage – light, age-consistent wear, runs strongly Photos form part of the description; please review them for a detailed visual assessment. Shipping and Taxes • Shipping: €45 – tracked and fully insured • Dispatch: within 72 h of cleared payment • Taxes & duties: No customs fees within the EU.  Shipping only within the EU. Why add this Worldmaster to your collection? Unitas workhorse inside – famed for reliability and parts availability. Timeless 37 mm steel case – wearable with both modern and vintage style. Excellent preserved condition – original crown, sharp case lines, crisp dial. Iconic Atlantic heritage – the Worldmaster line has been a benchmark of value-driven Swiss quality since the 1950s. High-resolution photos or video available on request—feel free to message via Chrono24 for any further details or offers.