The Calculator has a following among those seeking cool tools of industrial design from the past. Although it can look a little clunky and large at first, it can actually be quite comfortable and cool on the wrist. The first thing you notice is the two-layer slide rule on the bezel. The outer ring rotates and the inner ring remains fixed. The slide rule is designed to measure distance and also convert weight and volume from the imperial to the metric system and vice versa. Keeping all the slide rule portion on the bezel allows the dial to remain uncluttered, retaining a classic Heuer look from the 1970s with the bright neon hands and the subdial markers with a date at six. The watch was offered in navy blue as seen in this example and in black as well. Fun Fact: The current Design Director of BMW Group, Adrian van Hooydonk, has been seen wearing a Heuer Calculator over the years.

Information:

Reference: 110.633

Serial: 305XXX

Circa: 1970’s

Dial: Tritium - Blue

Hands: Tritium  - Lume is in intact aging the same as the dial into a yellow beige.

Bracelet: Champion - Stainless Steel

Case: 45.5mm x 15.5mm Thickness - Unpolished - Stainless Steel Tonneau

Lug Width: 22mm

Functions: Hours, Minutes, Seconds, Chronograph, Calculator, Date

Accessories: N/A

Crystal: Plexiglass

Bracelet size: 7.5”

Caliber: Caliber 12 - Automatic - Serviced January 2024 ( 1 s/d 323 Amp)

Condition: Great Vintage Condition

The case has light wear, especially from being from the 70's. Dial and hands are in great shape with lume intact and have become a nice beige color. The crystal is in great shape as well. The movement was serviced January 2024.