Thread: Stowa TO1 TESTAF

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  1. #1
    Member eblackmo's Avatar
    Join Date
    Dec 2014

    Stowa TO1 TESTAF

    The basics:
    Stowa TO1 TESTAF (TESTAF stands for Technischer Standard Fliegeruhren or Technical Standard for Pilot’s Watches)

    Attachment 10589938

    Diametre: 46mm
    Movement: Swiss made ETA 2824-2 chronometre grade 28800 bph
    Case: Titanium
    Crystal: Front: Domed sapphire - Back: sapphire
    Other: Signed crown, 200m water resistance, countdown bezel, TESTAF certified

    TESTAF was developed jointly by Euro Copter, Sinn and the University of Aachen. It was developed because at the time there was no current standard for pilot watches like there are for dive watches for example. (

    Stowa was founded in 1927 in Hornberg/Kinzigtal, Germany by Walter Storz. They were one of the five companies who manufactured the Beobachtungsuhr for the luftwaffe during WWII. The stowa factory was subsequently destroyed during allied air raids on Pforzheim. The factory was rebuilt and remained under the ownership of the Storz family until 1996. Currently stowa is owned by Jörg Schauer.

    Short Review

    I have owned this watch since 2015 and it is still one of my favourites. It originally came on a leather strap but I replaced that with a nato. I can see the thought that went into the design. It, is highly legible with no complications on the dial. It looks a lot like an instrument you might find in a cockpit.
    Attachment 10589954

    It has a 60 click bidirectional titanium count down bezel which has no play and clicks smoothly from minute to minute. The bezel insert has been sloped inwards which helps protect it from getting scratched. The crown is signed with the stowa logo.

    Attachment 10589962

    The movement is a beutifully finished ETA 2824 with a custom Stowa rotor.

    Attachment 10589970
    Attachment 10589978

    It is difficult to see the Stowa logo and TESTAF certified mark. Which is denoted by an aircraft in a circle on the dial unless it is in the right light. Stowa have applied both in grey.

    Attachment 10590002

    The build quality is great and the careful attention to detail and legibility and durability afforded by adhering to the TESTAF standard. Make this watch fantastic value for money. It's my third favourite after my T1 and Grand Seiko. :)
    Attached Images Attached Images

    Benzinger .. Dornblueth & Sohn .. Grand Seiko .. Sinn .. Laco .. Schaumburg .. Hamilton .. Tissot

  2. #2
    Member Nokie's Avatar
    Join Date
    Jul 2011
    Northern California

    Re: Stowa TO1 TESTAF

    Nice review and great pictures as well. Enjoy it.
    "Either he's dead or my watch has stopped"
    Groucho Marx

    "The only reason for time is so that everything does not happen at once..."
    Albert Einstein

  3. #3
    Moderator at Large stuffler,mike's Avatar
    Join Date
    Mar 2010
    The Hague-Amman-London-Berlin

    Re: Stowa TO1 TESTAF

    Copied this rewiew to the Stowa forum.
    Kind regards

    Instagram @mikestuffler

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