Monday, April 22, 2013

Flie​ger TO 1 TESTAF from STOWA

This just in from STOWA - 
Courtesy of STOWA
Why this new watch?

To be honest: We simply want to produce even better watches.
With the certification of the FH Aachen it will be possible for the first time to test the quality of the
watch in a scientific developed procedure. Function, design and quality have to pass a complex testing
procedure. For STOWA it was immediately clear to participate. Of course we continue to build our traditional and historical seeming pilot watches. But with the FLIEGER TO 1 TESTAF we want to go one
step further into the future. The name of the new watch is program:

TO1 = technical optimized.   TESTAF

The new standard for pilot watches in the watch industry. Developed by FH Aachen.
With the project "technical standard of pilot watches" (in short "TESTAF") for the first time a precise technicfunctional requirements catalog is submitted. This catalogue determines the regulations wrist-pilot
watches with analogue time display have to fulfill nowadays in the civil air traffic in regard to sight- and
instrument flight rules. 

In the last years the term pilot watch became an arbitrary term. Concrete functional and technical requests faded into the background.

Therefore the FH Aachen developed and submitted in cooperation with the watch company Sinn this
new standard. Until now there was no clear definition for pilot watches (like for example for diving

watches, DIN 8306/ISO 6425). This gap will now be closed with the TESTAF certification. STOWA wanted to test its 70 year experience in building pilot watches and decided immediately to participate in
this certification procedure. 

The new model FLIEGER TO1 TESTAF is currently tested at the FH Aachen and it is planned that the
certification will be terminated by May/June 2013.

Of course you can see the watch “live” in our company or also in our online-shop. You receive the complete
information to the TESTAF certification under the following link:
Courtesy of STOWA

We specially focus our attention to the design and readability of the watch. For example the contrast
of the dial marking and hands to the background of the dial. The brightness adaption between marking
and background has to be under standard conditions at least 14:1.

Shock and vibration resistance
The shock- and vibration tests are very sophisticated. Each test for itself is a challenge.
The shock resistance is tested according to DIN 8308/ISO1413 which is equivalent to a fall from one
meter height on the ground. After this fall the watch still has to run in the required tolerance. No part of the watch may cease its function. This is similar to the vibration test which toughly tests the watch by varying frequencies.


To assure a tactile feedback the swivel which is turnable in both directions has to have a noticeable minute
catch. The function of the operating elements has to be ensured over the complete temperature
range (-15 up to +55 degree Celcius).

Ambient pressure
Due to the frequent pressure gradients and the partially extreme situations during the flight a watch
certificated by TESTAF has to pass special pressure tests. For example a pressure difference of
0,261 bar has to run at least 2000 times to simulate a cycle change of the ambient pressure of 1.013
bar up to 0,752 bar to 1013 bar. This test simulates 2,000 starts and landings.

45/46 mm, height: 12.90 mm

titanium, matt

water proof
20 bar = 200 meters waterproof according to DIN 8310

low pressure proof
by special thick crystal sealings

turnable on both sides, undetachable screwed construction
cone special thick diameter for improved stability


Viton on crown and case, a sealing material used at space flights

AR-coated sapphire crystal on both sides, front sapphire crystal domed

black matt, white printed, Superluminova BWG9 (white illuminating color, at night light blue luminous)

Superluminova BWG 9

ETA 2824-2 in TOP quality, rhodium-coated, Geneve strips finish, golden STOWA engraving,
blued screws, shockproof acc. to DIN 8308, antimagnetic acc. to DIN 8309

strap buffalo leather or rubber strap fixed on very solid undetachable and screwed lugs

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