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A-11 Navigation (Hack) Watch Manual

Below are scans from the original War Department publication AN 05-35A-8, Handbook of Instructions with Parts Catalog for Navigation (Hack) Watch, 10 April 1945, a joint publication of the USAAF, USN, and RAF.

It contains instruction for the care and maintenance of the Waltham A-11 wristwatch issued for air navigation and includes complete servicing and adjustment instructions.

It’s interesting to see that the accuracy tolerance was a mere +/- 30 seconds in two positions, which starts to make on realize exactly how accurate modern watches are.

Click on the images below for a larger view.

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4 Responses

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  1. Tom Murdoch says

    I have an affiliate site that’s in dev right now.

    I am populating it with content (not exclusively) that’s out of the main streamn, and I’d like to use some of your content on the A11 military watches,

    with proper credit.

    Ok with you?

Continuing the Discussion

  1. Waltham A-11 Navigation (Hack) Watch Manual – I Already Have a Watch. linked to this post on 30 November 2009

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  2. Waltham A-11 Navigation (Hack) Watch Manual – I Already Have a Watch. linked to this post on 30 November 2009

    […] A-11 Navigation (Hack) Watch Manual […]

  3. US WWI A-11 a pilot watch? linked to this post on 04 June 2019

    […] is a good history of ithttps://forums.watchuseek.com/f7/wri…on-207560.html and also A-11 Navigation (Hack) Watch Manual ? I Already Have a Watch. Always give a word or a sign of salute when meeting or passing a friend, even a stranger, […]



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