Only Online Auction

Geneva, Apr 07, 2021

LOT 47

Self-winding centre-seconds; “Ipso Matic” “Bidynator”, so-called “Chioccolatone”; platinum and diamonds

CHF 6,500 - 9,800

EUR 6,000 - 9,000 / USD 7,200 - 10,800 / HKD 56,000 - 84,000

Platinum and diamond-set, self-winding, square-shaped with rounded corners, gentleman’s wristwatch, with snap-on case-back, silver colour dial with diamond-set indexes and centre-seconds.

Grading System
Grade: AAA


Case: 2-8

Very good

Slightly scratched

Movement: 2*

Very good

Overhaul recommended, at buyer's expense

Dial: 2-6-8-10-01

Very good

Slightly oxidized

Slightly scratched


HANDS Original

Brand Gubelin, Luzern / Lucerne

Model “Ipso Matic” “Bidynator”

Year circa 1955

Movement No. unnumbered

Case No. 139 026 (by Ponti, Gennari & Cie, Geneva)

Material platinum and diamonds

Bracelet black leather strap

Buckle stainless steel buckle

Caliber 11 ½ ’’’ (based on Bidynator 693, ebauche by Felsa, Grenchen / Granges), adjusted two positions

Height 31.3 mm.

Width 40.3 mm.

Signature dial, case and movement


The purchase price payable by a buyer will be the sum of the final bid price plus the buyer’s premium, together with any applicable sales or compensating use tax. In addition to the hammer price, the buyer’s premium is payable as follows: 25% of the hammer price on each lot.

Important notice – Special conditions Please look carefully at all the photos as they are an integral part of the description. Any defect not mentioned in the descriptions but visible on the photos will be considered as described and cannot lead to any claim. The dimensions are given as an indication and may slightly differ from the measures mentioned by the manufacturers especially for contemporary watches. The photos are not retouched. Colors may differ from reality. For timepieces, we guarantee neither the functioning nor the precision of the movement, nor the water-resistance of the case. In addition, please note that movements, parts of mechanisms or cases may be incomplete. The lots are sold “as is”, described to the best of our knowledge and cannot be returned. Once the online bid is placed by the bidder, it cannot be cancelled.