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