The 1970s were an exciting period for Heuer, with the Swiss watchmaker producing some of its most distinctive and technically ambitious chronographs. Alongside celebrated models such as the Monaco, Autavia and Carrera, the Calculator demonstrated Heuer's enthusiasm for combining mechanical precision with practical functionality.

Introduced in the early 1970s, the Calculator was designed around an unusually large rotating slide-rule bezel. This allowed the wearer to perform a variety of calculations, including multiplication, division, conversions and other numerical operations, without reaching for a separate instrument.

At its heart was Heuer's automatic chronograph technology, developed from the pioneering Chronomatic movement family introduced in 1969. The Calibre 12, an evolution of the original Calibre 11, offered automatic winding, a chronograph function and the distinctive left-hand crown arrangement associated with these movements.

With its substantial cushion-shaped case, colourful dial and unmistakable technical bezel, the Calculator captures an era when mechanical wristwatches were becoming increasingly adventurous in both appearance and capability.

Today, these distinctive chronographs offer collectors an interesting alternative to Heuer's better-known racing models, combining period styling with an impressive piece of Swiss watchmaking history.

What's on Offer

We are pleased to offer this impressive Heuer Calculator Automatic Chronograph, Reference 110.633, dating to approximately 1972–1974, featuring a striking blue dial and the renowned Heuer Calibre 12 automatic chronograph movement.

The first thing that catches the eye is the sheer presence of the watch. Measuring approximately 45mm across, its substantial stainless steel cushion-shaped case is unmistakably 1970s, with strong angular lines and a purposeful, instrument-like appearance.

Surrounding the dial is the Calculator's defining feature: its oversized rotating slide-rule bezel. Covered in finely graduated numerical scales, this ingenious arrangement transforms the watch into a mechanical calculating instrument. The bezel remains in very good condition, with the markings retaining much of their definition despite the passage of more than five decades.

The deep blue dial provides a wonderful contrast against the brushed steel case. Applied gold-tone baton hour markers introduce a little warmth, while the white chronograph hands and orange detailing within the right-hand register bring the design firmly into the sporting chronograph territory for which Heuer became famous.

The two-register layout is particularly attractive, with a 12-hour chronograph counter at 9 o'clock and a 30-minute counter at 3 o'clock. A neatly framed date aperture sits at 6 o'clock, maintaining the balanced appearance of the dial.

The dial itself is assessed as being in excellent condition, retaining its rich blue colouring and clearly defined printing.

Inside beats the Heuer Calibre 12, a 17-jewel automatic chronograph movement belonging to the celebrated Chronomatic family. Its unusual architecture places the winding crown on the left side of the case, with the chronograph pushers positioned conventionally on the right.

The stainless steel case is assessed as being in good condition, displaying marks of wear consistent with its age and previous use. The Plexiglass crystal is also graded good, while the watch is fitted with a black perforated leather strap that complements its sporting character.

With its imposing dimensions, fascinating calculating bezel and important automatic chronograph movement, this is a thoroughly characterful vintage Heuer. It is a watch that makes no attempt to disguise its 1970s origins — and is all the more appealing for it.

For collectors who appreciate the more unusual creations from Heuer's golden era, this Calculator represents an excellent opportunity to acquire a distinctive example of the brand's mechanical ingenuity.

NB: This watch is being offered for sale on behalf of a watch collector's family, who have asked us to assist with the sale of an extensive collection. As there are a considerable number of watches involved, the family has chosen not to incur the expense of servicing every individual watch before sale. The watch is running, but its previous service history is unknown. For this reason, it is offered as seen, unserviced and without a warranty, with the asking price reflecting these circumstances. 

Should you prefer to have the watch professionally serviced before delivery, this can be arranged through our watchmaker at an additional cost. Simply add a note when placing the watch in your basket, or contact us directly to discuss a quote.

Once professionally serviced, the watch will be supplied with a 12-month warranty.

Condition Report:

Crystal: Good

Dial: Excellent

Bezel: Very Good

Case: Good

Movement: See Description

Overall: Very Good