Welcome to the NavList Message Boards.


A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

Compose Your Message

Add Images & Files
    Re: A12 Sextant Maintenance
    From: David Pike
    Date: 2017 Sep 11, 13:24 -0700

    I’m still trying to find a four fluted Bristol wrench that’ll fit the grub screw in my A12 bubble chamber. Can anyone tell me the size I’ll need; not all kits, which I’ll have to order from the USA, carry a full set of four fluted keys?  I’ve examined the screw under a x10 magnifier, and I don’t think I dare risk using the ground down Allen key which came with the sextant.  Also, the number stamped on my bubble chamber is T265.  Does that mean I shouldn’t be disappointed if there’s no little steel ball under the grub screw? DaveP

    Browse Files

    Drop Files


    What is NavList?

    Join NavList

    (please, no nicknames or handles)
    Do you want to receive all group messages by email?
    Yes No

    You can also join by posting. Your first on-topic post automatically makes you a member.

    Posting Code

    Enter the email address associated with your NavList messages. Your posting code will be emailed to you immediately.

    Email Settings

    Posting Code:

    Custom Index

    Start date: (yyyymm dd)
    End date: (yyyymm dd)

    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site