A new arrival at Calibre 11 HQ this week, when a beautiful Heuer Calculator Calibre 12 arrived (Reference 110.633). This is the first Calculator that I have owned and have to say that it’s a hugely impressive watch, offering enough “vintage” to clearly not be a modern watch, but at the same time having a contemporary size, sitting at 45mm.
Here is a brief overview of the Calculator, one of Heuer’s lesser-known Chronographs.
The Calculator has a large case, with a combination of a polished side and star-burst upper case. It has a fantastic heft to it, feeling very much the type of watch that TAG Heuer might offer today. The watch has a plexi crystal which sits proud of the case, making it vulnerable to the occasional scratch.
And of course, there is also the large, rotating bezel containing a myriad of scales, from which the Calculator takes its name.
The model shown here is powered by Heuer’s Calibre 12 automatic movement, but there were other variants offered too- Calibre 15 and hand-wound Valjoux 7740.
The caseback is somewhat generic, and does not have the Heuer shield or the watch’s reference number. While not visible in these photos, the caseback is quite deep.
The Calculator was part of the Heuer range for many years, and was offered with several bracelet designs during this time- this is one of the later bracelets and my favourites.
Collecting the Heuer Calculator
While the photo above is a brilliant one, you may notice that something is amiss…this watch has the wrong dial. Here we have a Calibre 12 watch (110.633), but the dial comes from the manual-wind 740.633. The giveways here are the lack of “Automatic Chronograph” on the dial and the metal surrounds on the hour-markers, which are lacking on the Calibre 12 model.
The Calculator is one of the few vintage Heuer models where mint or NOS examples are reasonable plentiful. The watch sails comfortably under the radar of most collectors, and while that is unlikely to change, the Calculator is one of my favourite vintage Heuer models.