Slide Rule Wristwatches (Page 5):
Other Slide Rule Watches

Kienzle

The Kienzle Multiplikator is a German watch from the 70s. It has a fiberglass case similar to the Tissot Sideral. (photo courtesy of theretroworld.com)

Anonimo

The Italian Watch brand Anonimo introduced the 3003 model with a slide rule in 2002. Unfortunately, it doesn't seem to be listed in the current Anonimo line

Bulova

The first Bulova to feature a slide rule is this Marine Star, model 96B101. It was apparently introduced in late 2009.

Alpha

Alpha is a Chinese company that produces decent replicas of more expensive watches. I'm not usually much interested in replicas, but their Breitling for Bentley copy might be worth getting for the inverted scales. Only the Juvenia arithmo, early Breitling manual-wind Chronomat and the current Breitling for Bentley models have this scale arrangement. The inner scale runs the usual left to right, but the outer scale is inverted running right to left. This is handy for calculations involving reciprocals, but can still do standard multiplication and division as well. This is the "huge 49mm Alpha Multifunction 21 Jewels Automatic Ceramic Black Dial Mans Watch" in the "sporty" category.

Poljot

Poljot makes some attractive slide rule watches, as well as some faux slide rule fashion watches. Here's a nice automatic with a working slide rule.

Poljot's Blue Angels model has a non-turning bezel. I wonder how many customers have mistakenly bought this watch on the internet thinking it had a working slide rule?

No one is likely to buy Poljot's Ruslan model for the slide rule, since it has only one logarithmic scale on a fixed bezel!

Vostok

Vostok made the attractive Lunokhod model which comes with this unwieldy leather band.

New in 2008 is the automatic Energia model.

Tommy Bahama

Currently all things retro seem fashionable, and slide rule watches are no exception. The Tommy Bahama "Panama Pilot" is a good example. It has a yellow dial that simulates a vintage Breitling. As many fashion watches, it misses some functional aspects, like the third scale that allows "flight computer" watches to do time and distance calculations, but it is an attractive watch.

Sekonda

Sekonda makes some inexpensive watches with slide rules. The 3843 (on the left) appears to be very similar to the Tommy Bahama watch, and the 3850 (on the right) is styled similarly to the Citizen Navihawk.

Invicta

The full name of this model seems to be Invicta Men's ll Collection Pilot Multi-Function Leather Watch #3057.

Invicta has the Speedway model in its 2007 line.

Nautica

Nautica has some nice looking slide rule watches in the 2008 catalog.

Rendex

Rendex is apparently a budget brand with some association with Zeno. I'm not sure if the "Big Pilot No. 7" is as big as the oversize Zenos, but it's equally attractive.

Trias

Trias introduced both 12 and 24 hr versions of their automatic Camouflage model in 2007. I have the 24hr model, and I like it, but it's got some problems. Its hands are too big for the dial, and the minute hand obscures the minute markings. Mine has a slide rule with some innaccuracy as well. The tick marks are a bit off between 70 and 90 so 10 x 80 = 790. It sells for just over $100, so I'd still call it a good deal as there aren't any other "poor man's Cosmonautes" on the market. Build quality is good, and the automatic movenment is both quiet and accurate. It's marked "Trias Germany" but it (like many Trias watches) uses a Chinese movement, and much if not all of the assembly may take place in China as well. (Unlike Swiss, there is no legal meaning to a watch with the label "Germany.") It's a fairly large 44mm case on a 22mm strap.


Trias also do this quartz chronograph. This version has hands the correct size, but in this picture it's fairly easy to see that this is not a very accurate slide rule. The "45s" are almost lined up, but on the other side of the dial the "19s" are off by about 2 ticks.

There are many other brands in the Trias "stable." Lindberg & Sons, SwissStar, RetroChron and Chenevard are all similar watches sold by the same vendors as Trias. Heres the "Open Heart" Lindberg and Sons model. If you look closely, you can see similar inaccuracy in the dial of this watch as well.

I find it interesting in that you can get a Trias automatic chronograph in the $300 range. The movement is apparently a Chinese copy of the Swiss Valjoux 7750. This is the oversized 55mm RetroChron automatic chronograph:

Here's the attractive SwissStar version. Notice how the name SwissStar is written as two words at the bottom of the dial in the same manner as "Swiss Made."

The Chenevard version actually says "Swiss" on the back of the case which is dubious at best. It's a shame Trias plays these games because I actually find the watches very appealing. In my opinion, there's no reason to obscure their Chinese origin. Casio stamps "Made in China" on the back of their watches, and that doesn't seem to hurt their sales!

Jules Jurgensen

Jules Jurgensen markets an Analog-Digital hybrid with a slide rule.

Kenneth Cole

Kenneth Cole does this attractive quartz model KS3016.

National Geographic

National Geographic sells a line of watches and many of them feature slide rules. This one is model #NG770B and is solar powered.

Jeep

There are several slide rule watches that have the brand Jeep. They are all part of the "Sky" range. This is the ana-digi model #JE3019.

Aeromatic

Here's the humorously named "Aeromatic." Aeromatic is a Chinese brand, and they actually use an automatic chronograph movement on some of their watches. The Chinese automatic chronograph movement is a copy of the Valjoux 7750, but I don't know if they've fitted it to a slide rule watch. Not a bad looking watch really.


Page 1: Introduction, History and Breitling slide rule watches

Page 2: Ollech & Wajs, Sinn, Hacher and Heuer slide rule watches

Page 3: Other Swiss slide rule watches

Page 4: Japanese slide rule watches--Seiko, Citizen, Casio, Orient and Kentex

Page 5: Other slide rule watches



Corrections, comments and additions to Art Simon