Breitling, Ref. 81610 Navitimer self-winding, (c.) 1990

Brand Breitling, Grenchen / Granges
Model “Navitimer”
Year circa 1990
Reference 81610
Calibre 13, self-winding, 17 jewels
Case No. 028
Material/s yellow gold (18-carat)
Bracelet leather strap
Buckle later gilded brass double-folding deployant clasp
Dimensions Ø 41.5 mm. (bezel)
47.8 x 39.7 mm.
Thickness 14.2 mm.
Weight 120 gr. (approx.)
Signature dial, case and movement

* An additional 0.9% surcharge applies to the hammer price for local delivery only.

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Breitling
Ref. 81610, large self-winding, chronograph, minutes and hours counters, patented slide-rude scale, revolving bezel, date, calibre 13; “Navitimer”; yellow gold (18-carat)

Yellow gold (18-carat), self-winding, vertical tonneau-shaped, large aviator’s wristwatch, with subsidiary seconds at 9 and four horological complications:
• 1/8 second chronograph (activated by the two round-shaped screwed push-pieces located on the case-band) with tachometer and telemeter scales, patented slide-rude scale on revolving bidirectional bezel
• Half-instantaneous 30-minute counter (subsidiary dial at 12 o’clock)
• 12-hour counter (subsidiary dial at 6 o’clock)
• Half-instantaneous date of the month (aperture at 3 o’clock)

Case: three-piece, polished, water-resistant with snap-on case-back; polished “B” crown; yellow gold polished notched bezel.

Dial: silver colour, with revolving radiating luminescent indexes, gold colour auxiliary dials; yellow gold luminescent “Bâton” hands, black painted indexes.

Movement: calibre 13 (based on ETA 7750) self-winding, 17 jewels.

Slide-rude scale based on the Swiss invention patent No. 217 012, delivered on September 30, 1941 (application filed on August 26, 1940), to Adrien Schweizer, La Chaux-de-Fonds, for a “Pièce d’horlogerie permettant d’effectuer des opérations tachymétriques et télémétriques” (Timepiece allowing to perform tachometric and telemetric calculations).

Elegance very fine FF
Rarity very rare RR
Case very good 8 / 10
Dial very good 8 / 10
Movement very good 8 / 10
Expert opinion very good