This 1970’s Difor features a unique bold chrome plated case with compressor style crowns, a solid steel caseback as well as a domed acrylic crystal. The rotating outer bezel works as a slide rule bezel whilst the inner rotating bezel, operated by the crown at 2, works as a traditional 60 minute timer. The crown at 4 is for the watch’s standard functions, such as winding and time setting.
Slide rule bezels are rarely seen, the most common watch it could be found on would be Breitling’s iconic Navitimer. The circular slide rule has a mobile scale (on a watch, this is on the bidirectional bezel), and a second, fixed scale (on the dial), each with its own graduations. Together they can be used to perform simple mathematical calculations such as multiplications, divisions, conversions and “rule of three” cross-multiplications.
The movement powering this quirky Difor is the Swiss made FE 140-1. A manual wind movement further adding onto its vintage charm.
Case and Strap
- Original, cushion style case with rotating slide rule bezel.
- Chrome plated case body.
- Acrylic crystal.
- Stainless steel screw caseback with aqua-diver emblem.
- New black nylon seatbelt strap.
- Width w/ crown 42 mm.
- Full height 42 mm.
- Thickness 12.5 mm.
- Strap width 20 mm.
Dial and Hands
- Original red sunburst dial.
- Original painted indices with mint green lume.
- Quirky date window over 3 position.
- Silver-tone block style hands with original mint green lume.
- Lollipop style seconds hand with mint green lume.
- Swiss made movement.
- FE-140-1 calibre.
- Manual wind.
- Sweep second.
- 21 jewels.
- 47hr power reserve.
- Testing duration: 2 week cyclic test.
- Average timekeeping range: 20-40 sec/day.
Servicing and Guarantee
- Fully serviced.
- Mechanics in full working order.
- New nylon strap.
- 12-month guarantee.
- Guarantee Terms and Conditions.