IWC Ingenieur 3505 SL Two Tone 1987
Industrial Sophistication, Rare Two-Tone Charm — IWC Ingenieur SL 3505
A rare icon from the 1980s, this IWC Ingenieur SL blends sporty engineering with understated luxury.
Produced for just a few short years between 1985 and 1989, reference 3505 is an elusive gem—especially in this two-tone variant with its 18k yellow gold bezel and original golden papergraph dial. The integrated bracelet and tonneau case echo Gérald Genta’s design language, while refined touches like gold indices, drilled bezel portholes, and a flawless original dial elevate the piece into collectible territory.
This example comes in excellent condition and includes its original box and papers—a full set that's becoming increasingly difficult to find.
- wrist size in our picture is 18cm circumference -
DIAL:
- original never touched golden papergraph dial in flawless condition
- original hands and crown
BRACELET & CLASP:
- original IWC stainless steel bracelet with no stretch is fitting up to 18.5 cm wrist size (comes with two additional links to extend up to 19.5cm) / 3 mm thick
- original IWC stainless steel clasp
CASE:
- excellent overall condition, showing minor traces of use
- 3- body stainless steel / 18k yellow gold case with screw-down case back
- 34 mm (without crown) / 39 mm (lug-to-lug) / 23 mm (between lugs) / 9 mm thick
- year: 1987
- reference: 3505
- total weight: 117 g
MOVEMENT:
- IWC Cal. 375 - automatic
- 21 jewels, 28800 A/h, 42 hours power reserve
- professionally serviced 12/2024
- +7 sec/d / 270°
BOX & PAPERS:
- original IWC box (signs of use)
- comes with original IWC warranty booklet from first purchase in 1987
- in the booklet is a typo regarding the reference, it's written 3506, but the watch is identified being a 3505 reference and also has 3505 in the caseback. Our assumption is that the jeweler made a mistake when filling out the papers
GOLDAMMER REFERENCE: #811
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Product Information
Shipping & Returns
Shipping & Returns
IWC Ingenieur 3505 SL Two Tone 1987
IWC Ingenieur 3505 SL Two Tone 1987
Industrial Sophistication, Rare Two-Tone Charm — IWC Ingenieur SL 3505
A rare icon from the 1980s, this IWC Ingenieur SL blends sporty engineering with understated luxury.
Produced for just a few short years between 1985 and 1989, reference 3505 is an elusive gem—especially in this two-tone variant with its 18k yellow gold bezel and original golden papergraph dial. The integrated bracelet and tonneau case echo Gérald Genta’s design language, while refined touches like gold indices, drilled bezel portholes, and a flawless original dial elevate the piece into collectible territory.
This example comes in excellent condition and includes its original box and papers—a full set that's becoming increasingly difficult to find.
- wrist size in our picture is 18cm circumference -
DIAL:
- original never touched golden papergraph dial in flawless condition
- original hands and crown
BRACELET & CLASP:
- original IWC stainless steel bracelet with no stretch is fitting up to 18.5 cm wrist size (comes with two additional links to extend up to 19.5cm) / 3 mm thick
- original IWC stainless steel clasp
CASE:
- excellent overall condition, showing minor traces of use
- 3- body stainless steel / 18k yellow gold case with screw-down case back
- 34 mm (without crown) / 39 mm (lug-to-lug) / 23 mm (between lugs) / 9 mm thick
- year: 1987
- reference: 3505
- total weight: 117 g
MOVEMENT:
- IWC Cal. 375 - automatic
- 21 jewels, 28800 A/h, 42 hours power reserve
- professionally serviced 12/2024
- +7 sec/d / 270°
BOX & PAPERS:
- original IWC box (signs of use)
- comes with original IWC warranty booklet from first purchase in 1987
- in the booklet is a typo regarding the reference, it's written 3506, but the watch is identified being a 3505 reference and also has 3505 in the caseback. Our assumption is that the jeweler made a mistake when filling out the papers
GOLDAMMER REFERENCE: #811
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
Industrial Sophistication, Rare Two-Tone Charm — IWC Ingenieur SL 3505
A rare icon from the 1980s, this IWC Ingenieur SL blends sporty engineering with understated luxury.
Produced for just a few short years between 1985 and 1989, reference 3505 is an elusive gem—especially in this two-tone variant with its 18k yellow gold bezel and original golden papergraph dial. The integrated bracelet and tonneau case echo Gérald Genta’s design language, while refined touches like gold indices, drilled bezel portholes, and a flawless original dial elevate the piece into collectible territory.
This example comes in excellent condition and includes its original box and papers—a full set that's becoming increasingly difficult to find.
- wrist size in our picture is 18cm circumference -
DIAL:
- original never touched golden papergraph dial in flawless condition
- original hands and crown
BRACELET & CLASP:
- original IWC stainless steel bracelet with no stretch is fitting up to 18.5 cm wrist size (comes with two additional links to extend up to 19.5cm) / 3 mm thick
- original IWC stainless steel clasp
CASE:
- excellent overall condition, showing minor traces of use
- 3- body stainless steel / 18k yellow gold case with screw-down case back
- 34 mm (without crown) / 39 mm (lug-to-lug) / 23 mm (between lugs) / 9 mm thick
- year: 1987
- reference: 3505
- total weight: 117 g
MOVEMENT:
- IWC Cal. 375 - automatic
- 21 jewels, 28800 A/h, 42 hours power reserve
- professionally serviced 12/2024
- +7 sec/d / 270°
BOX & PAPERS:
- original IWC box (signs of use)
- comes with original IWC warranty booklet from first purchase in 1987
- in the booklet is a typo regarding the reference, it's written 3506, but the watch is identified being a 3505 reference and also has 3505 in the caseback. Our assumption is that the jeweler made a mistake when filling out the papers
GOLDAMMER REFERENCE: #811
