Geneva, Nov 08, 2025
LOT 237
ROLEX, SWITZERLAND, REF. 3525, "MONOBLOCCO", CHRONOGRAPH, BLACK TROPICAL DIAL, STAINLESS STEEL
CHF 30,000 - 60,000
HKD 292,000 - 590,000 / USD 37,500 - 75,000 / EUR 32,300 - 65,000 / JPY 5,700,000 - 11,390,000
Sold: CHF 57,500
A very fine, rare, attractive, stainless steel, manual wind water resistant chronograph wristwatch with black dial.
| Grading System | |
|---|---|
Grade: AAA |
Excellent |
Case: 3-8 |
Good Slightly scratched |
Movement: 3-6* |
Good Slightly oxidized Overhaul recommended, at buyer's expense |
Dial: 3-6-01 |
Good Slightly oxidized HANDS Original |
Brand Rolex, Switzerland
Model "Monoblocco"
Reference 3525
Year Circa 1940
Case No. 185858
Bracelet stainless steel Rolex buckle
Diameter 35 mm.
Caliber 13''', 17 jewels
Signature Dial, case and movement
Notes
One of the most attractive chronographs ever produced by Rolex, the reference 3525 is known to collectors as monoblocco due to its single case construction. Built as the first oyster case chronograph featuring a screw-down caseback and crown, this first generation example featuring crisp numbers to the caseback has been conserved in wonderful condition and has the rare black dial configuration.