Description
Title: Vintage Mondia 9ct Gold Mechanical Watch – Working – With Box – British Hallmarked
Description: Rare Vintage Solid Gold Timepiece – Authentic Mondia Swiss Movement
Presented for auction is this elegant vintage Mondia gentleman’s wristwatch, crafted in solid 9-carat (375) gold with full British assay office hallmarks.
This mid-century dress watch combines timeless Swiss engineering with precious metal construction—a perfect choice for collectors or those seeking refined everyday elegance.
Key Specifications:
Brand: Mondia (Switzerland)
Gold Purity: 9ct Solid Gold (375 / 9K) – Fully tested & hallmarked
Case Size: Approx. 34mm diameter (including crown) × 40mm lug-to-lug
Movement: Mechanical hand-wound calibre, 17 jewels, Swiss Made
Dial: Original silver-white sunburst dial with applied gilt baton markers
Glass: Acrylic crystal
Condition: Excellent vintage – Running smoothly, serviced recently
The Case & Hallmarks (Authenticated):
This is a genuine solid gold case—NOT gold-plated or filled. The screw-down case back displays clear British import/hallmark stamps confirming authenticity:
“375” stamp = 9ct Gold Standard (37.5% pure gold)
Maker’s Mark: “D&S” (renowned case manufacturer)
Assay Office Markings: Full hallmark punches visible including date letter & serial number “189311”
Exterior finish: Polished bezel with circular brushed case back showing minimal signs of gentle age use consistent with a well-cared-for vintage piece
Note: Service inventory numbers (“43077” / “MSGN0316”) are jeweller’s reference marks only.
The Movement:
Inside beats a genuine Mondia Swiss mechanical movement (calibre base plate marked “MONDIA SEVENTEEN JEWELS SWISS B.P.O.”). This hand-wound mechanism features:
17-jewel incabloc-style shock protection
Blued steel screws on the balance wheel
Fully functional – The watch is keeping good time, winding smoothly, and setting correctly via the signed crown. Ticks with that satisfying mechanical “heartbeat.”
Vintage Mondia 9ct Gold Watch (working order)
Brand-new high-quality brown leather strap (fitted, ready to wear – 18mm or 20mm lug width as appropriate)
Original Mondia presentation box – Black exterior with cream satin interior bearing the brand name (shows slight storage wear but structurally sound)
(Strap is new replacement)
Dimensions & Fit:
Case Diameter: 34mm (including crown) – Perfect vintage size, wears like a modern 36-38mm due to no bezel overhang
Lug Width: 18mm standard
Fits wrists 6.5”–8” with new strap holes; can be easily re-strapped by buyer
Condition
Case: Very good for age. Light surface patina consistent with 60+ years of careful ownership. No deep dents, cracks, or repairs. Gold has been lightly polished in its lifetime but retains sharp hallmarks.
Dial is Clean, attractive silver-white tone with minor aging spots if examined under loupe. No chips or significant fading. Hands are clean and straight.
Original crown winds smoothly.
Movement: Working well with strong amplitude.
Condition: Used
Delivery option: Delivery
Location: SA15
Category: Antiques
Description: Rare Vintage Solid Gold Timepiece – Authentic Mondia Swiss Movement
Presented for auction is this elegant vintage Mondia gentleman’s wristwatch, crafted in solid 9-carat (375) gold with full British assay office hallmarks.
This mid-century dress watch combines timeless Swiss engineering with precious metal construction—a perfect choice for collectors or those seeking refined everyday elegance.
Key Specifications:
Brand: Mondia (Switzerland)
Gold Purity: 9ct Solid Gold (375 / 9K) – Fully tested & hallmarked
Case Size: Approx. 34mm diameter (including crown) × 40mm lug-to-lug
Movement: Mechanical hand-wound calibre, 17 jewels, Swiss Made
Dial: Original silver-white sunburst dial with applied gilt baton markers
Glass: Acrylic crystal
Condition: Excellent vintage – Running smoothly, serviced recently
The Case & Hallmarks (Authenticated):
This is a genuine solid gold case—NOT gold-plated or filled. The screw-down case back displays clear British import/hallmark stamps confirming authenticity:
“375” stamp = 9ct Gold Standard (37.5% pure gold)
Maker’s Mark: “D&S” (renowned case manufacturer)
Assay Office Markings: Full hallmark punches visible including date letter & serial number “189311”
Exterior finish: Polished bezel with circular brushed case back showing minimal signs of gentle age use consistent with a well-cared-for vintage piece
Note: Service inventory numbers (“43077” / “MSGN0316”) are jeweller’s reference marks only.
The Movement:
Inside beats a genuine Mondia Swiss mechanical movement (calibre base plate marked “MONDIA SEVENTEEN JEWELS SWISS B.P.O.”). This hand-wound mechanism features:
17-jewel incabloc-style shock protection
Blued steel screws on the balance wheel
Fully functional – The watch is keeping good time, winding smoothly, and setting correctly via the signed crown. Ticks with that satisfying mechanical “heartbeat.”
Vintage Mondia 9ct Gold Watch (working order)
Brand-new high-quality brown leather strap (fitted, ready to wear – 18mm or 20mm lug width as appropriate)
Original Mondia presentation box – Black exterior with cream satin interior bearing the brand name (shows slight storage wear but structurally sound)
(Strap is new replacement)
Dimensions & Fit:
Case Diameter: 34mm (including crown) – Perfect vintage size, wears like a modern 36-38mm due to no bezel overhang
Lug Width: 18mm standard
Fits wrists 6.5”–8” with new strap holes; can be easily re-strapped by buyer
Condition
Case: Very good for age. Light surface patina consistent with 60+ years of careful ownership. No deep dents, cracks, or repairs. Gold has been lightly polished in its lifetime but retains sharp hallmarks.
Dial is Clean, attractive silver-white tone with minor aging spots if examined under loupe. No chips or significant fading. Hands are clean and straight.
Original crown winds smoothly.
Movement: Working well with strong amplitude.
Condition: Used
Delivery option: Delivery
Location: SA15
Category: Antiques
Buyer's Premium
26%
Vintage Mondia 9ct Gold Mechanical Watch – Working – With Box – British Hallmarked
Estimate £0-£0
Starting Price
£225
Antiques, Jewellery & Collectables | Collective...
Jun 15, 2026 7:00 AM EDTMultiple sites, United Kingdom
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