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IWC Extremely Rare Hermet Cal.89 Steel / 38 mm / Serviced / 1955


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Basic Info

Brand IWC
Ref. No. n/a
Movement Manual winding
Case material Steel
Bracelet material Leather
Year 1955
Condition 1 (mint)
Gender Men's watch/Unisex
Location Germany, München
Price 3,000 € (= [SOLD])
Availability Available now


Movement Manual winding
Movement/Caliber Cal.89
Number of jewels 17
Frequency 18000 A/h


Case material Steel
Case diameter 38 x 46 mm
Waterproof Not Waterproof
Material bezel Steel
Glass Plastic
Dial Silver
Dial numerals No numerals


Bracelet material Leather
Bracelet color Brown
Lug width 20 mm Size guide
Clasp Buckle


Center Seconds, Limited Edition, Only Original Parts


Free Worldwide Insured Shipping with FedEx / Authenticity Guaranteed / 14-days Inspection Period / 1-year Warranty

Extremely rare timepiece - International Watch Co "Hermet". This type of case was produced by IWC in limited amounts and featured special type of snap-on caseback providing additional humidity- and dust-proof capabilities, that is why it was called "Hermet" derived from "Hermetique". Hermet cases existed in few sizes and this particular example is the biggest one - 38 mm without crown. What makes this watch even more special is the movement. While most of known Hermet timepieces were produced with Cal.83, this stunning piece bears bullet-proof Cal.89 with sweep seconds hand. So far it is the first piece we have ever seen with Cal.89.

The watch boasts with very well maintained case which probably has never been polished and therefore shows correct size of 38 mm and extremely sharp edges. The dial shows certain character with light aging and spotting. The movement has been professionally overhauled and serviced in Switzerland.

The watch went through complete service in October 2016.

Manufacturer: IWC Schaffhausen, Switzerland
Model: Hermet
Reference: n/a
Type: Manual-winding wristwatch
Year of production: ca.1955 (according to case and movement serial numbers)
Case type: 3-body, with snap-on caseback and double-stepped bezel.
Case material: Stainless steel
Case measurement: 38 mm (without crown) / 46 mm (lug-to-lug) / 20 mm (between lugs)
Case serial number: 1162928
Case back: Snap-back, signed "Acier Inox" along with IWC logo, and serial number.
Crown and pushers: stainless steel fluted crown signed with IWC "fish" logo.
Crystal: Acrylic
Movement type: Manual-winding with sweep second hand
Movement model: Robust, precise and collectible Caliber 89, signed ‘International Watch Co Swiss’, with Côtes de Genève, polished screws, Breguet spring, 17 jewels, 18000 A/h.
Movement serial number: 1270726
Dial: Silver dial with applied golden minute markers on the outer perimeter of the dial, raised golden faceted hour markers. Signed ‘International Watch Co Schaffhausen’ at 12 o’clock and "Swiss" at 6 o'clock.
Hands: Original sword golden hour, minute hands, golden sweep seconds hands.
Case condition: 1 (mint). Possibly unpolished, showing normal signs of use and wear. Dent on the edge of lower-right lug.
Movement condition: 1 (mint) Professionally serviced in September 2016, only original parts. Adjusted and keeps good time.
Dial/hands condition: Untouched original dial with moderate patina over the surface.
Overall condition: 1 (mint)
Set of delivery: The watch comes with brand-new genuine leather strap, aftermarket generic buckle, our company’s warranty certificate, general terms and conditions of sale, our company’s box.
Warranty: 1-year international technical warranty by our watchmakers

Size guide for wristbands

1 | Lug width

The lug width is the width of the strap at the end that is attached to the watch. This is the interior distance between the two lugs (horn-like protrusions) on the watch casing. The strap will fit your watch only if the lug width of the watch is the same width as the strap.

2 | Buckle width

The buckle width is the width of the strap at the buckle end. If you want to keep your watch’s original buckle and replace only the strap, the width of the original buckle must be identical to the strap width. For watches with folding clasps, please choose a strap specially made for your particular clasp.

3 | Strap length

The strap length is the combined length of the short strap side 3A (without buckle) and the long strap side 3B. For metal straps, the length of the strap including the clasp is measured in the closed position.

4 | Strap thickness

Strap thickness is the height of the strap. Many leather straps thin out towards the buckle end, or “taper”. If you want to keep your watch’s original buckle and replace only the strap, the strap thickness must match the height of the original buckle. For watches with folding clasps, please choose a strap specially made for your particular clasp.