Sibon 15 Rubis Small Seconds Skeletonized Vintage Watch (Two-Tone Case, Switzerland) – Unusual Transparent Design with Collector Appeal Model Overview: This vintage Sibon 15 Rubis is a highly distinctive mid-century Swiss mechanical wristwatch featuring an uncommon semi-transparent “skeleton-style” dial and case construction that immediately sets it apart from conventional dress watches of the era. Produced during the golden age of smaller independent Swiss manufacturers, the watch combines elegant classical proportions with a surprisingly modern architectural aesthetic. The partially transparent chapter ring, visible movement elements, and warm two-tone metal finish create a watch that feels both vintage and avant-garde at the same time. The manually wound 15-jewel Swiss movement and small seconds subdial reinforce its authentic period character, while the antimagnetic marking reflects the practical technical ambitions of Swiss watchmaking during the post-war decades. Pieces like this are increasingly appreciated by collectors looking for unusual, conversation-starting vintage watches beyond mainstream brands. The watch has strong visual presence despite its refined dimensions and wears exceptionally well thanks to its elegant curved lugs and warm patinated tones. Technical Specifications Brand: Sibon Model: 15 Rubis Small Seconds Movement: Manual winding Swiss mechanical movement, 15 jewels Country of Manufacture: Switzerland Production Era: Approx. 1950s–1960s Serial / Case Number: Not visible Case Material: Two-tone metal case with transparent decorative outer ring Dimensions: Approx. 34–35 mm estimated Bezel: Integrated transparent segmented bezel design Crystal: Acrylic Water Resistance: Not tested Dial & Hands Dial Colour: Silver / champagne textured dial Markers: Applied Arabic numerals integrated into transparent outer ring Date: No Branding: “Sibon 15 Rubis” beneath 12 o’clock Hands: Dauphine-style hands with small seconds subdial at 6 o’clock Caseback Material: Transparent display-style back construction Attachment: Snap-on Engravings: “Swiss Made” Strap & Buckle Strap: Brown leather strap, replacement strap fitted Buckle: Standard metal buckle Notable Historical / Brand Context During the 1950s and 1960s many smaller Swiss maisons experimented with futuristic case architecture and unusual dial executions in response to changing industrial design trends. This Sibon is a fascinating example of that experimental spirit. The transparent segmented chapter ring gives the watch an almost floating-dial appearance decades before skeleton and sapphire-heavy designs became fashionable in modern luxury watchmaking. The watch also reflects the era when Swiss brands actively promoted technical terms such as “Antimagnetic” and jewel counts as marks of quality and reliability. Its design language shares visual DNA with certain Art Deco revival and early space-age influenced watches of the period. Collector Appeal & Value Potential This watch will particularly appeal to collectors seeking uncommon independent Swiss vintage pieces with strong visual individuality. The transparent architectural dial layout makes it far rarer and more memorable than standard period dress watches. Collectors increasingly value unique design-driven vintage watches that stand out from mass-produced mainstream references, especially pieces that combine authentic patina with unusual engineering aesthetics. Its wearable size, visible movement concept, and strong mid-century styling give it excellent display and conversation value. Condition Report The watch is presented in honest vintage condition with visible signs of age and wear consistent with its era. The case shows plating wear and patina, especially around the bezel and lug areas, contributing to its authentic vintage character. The dial retains attractive original texture with light aging visible. Crystal shows signs of wear and minor scratches. The movement appears clean visually through the rear display opening. Service history is unknown. Delivery Packaging: Carefully packed in generic watch box Shipping: Registered and insured shipping from EU. Professional packaging and tracking included.