longines mainspring

Discussion in 'Wrist Watches' started by Dave Haynes, Feb 25, 2001.

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  1. Dave Haynes

    Dave Haynes Registered User

    Sep 12, 2000
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    I've got an old Longines from the 30's with an obsolete 11L movement, 1187. I can't get it to run well because I can't find a mainspring for it. The problem is these early Longines have T ends and while I have plenty of White alloy springs that have the same Dennison specs, none have the T ends. I've tried using similar T end blue springs for
    Whittnauers etc. none are absolutely correct.
    Dennison specs are:5x11x13 1/4 there is apparently no whitealloy number, Marshall
    number is LO-2718.
    I could modify the barrel to accept a non-T
    end, but only as a last resort.
    Can anyone help?
    Thanks
     
  2. Dave Haynes

    Dave Haynes Registered User

    Sep 12, 2000
    1,297
    1
    38
    I've got an old Longines from the 30's with an obsolete 11L movement, 1187. I can't get it to run well because I can't find a mainspring for it. The problem is these early Longines have T ends and while I have plenty of White alloy springs that have the same Dennison specs, none have the T ends. I've tried using similar T end blue springs for
    Whittnauers etc. none are absolutely correct.
    Dennison specs are:5x11x13 1/4 there is apparently no whitealloy number, Marshall
    number is LO-2718.
    I could modify the barrel to accept a non-T
    end, but only as a last resort.
    Can anyone help?
    Thanks
     
  3. Harold Visser

    Harold Visser Registered User

    Aug 24, 2000
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    Scottsdale
    Country Flag:
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    Dave, I have a Hamilton #718271 which is
    5x12.5x13.5 with T end mainspring, let me know if you want it,no charge,I think it's
    about as close as you can get.
    Regards, Harold
     
  4. Dave Haynes

    Dave Haynes Registered User

    Sep 12, 2000
    1,297
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    Harold: My bet is that the Hamilton T is alot bigger than the Longines barrel will handle.
    I probably have the spring you're talking about, but never thought to look there.
    Hold on for a bit while I look.
    Thanks,
    Dave
     
  5. bsaunders

    bsaunders Guest

    The Marshal book and the Best fit both list something completly different from your number and size.
     
  6. Dave Haynes

    Dave Haynes Registered User

    Sep 12, 2000
    1,297
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    My Bestfit#111 shows 5x11x13 1/4.
    My Sandsteel shows 5 1/2x10 1/2x12 1/2
    Marshall just has LO 3391
    any spring must have a T end.
     
  7. Dave Haynes

    Dave Haynes Registered User

    Sep 12, 2000
    1,297
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    Steve: Thanks for the tip. I suppose I could also put a catch on the inside of the barrel
    and use a white-alloy? I must have 15 or so
    whitealloys that will fit the size. I have an extra barrel to screw up. This is a popular
    but old movement. Now I need to find a click
    for a Longines 10L. I've got the whole watch
    a runner with a bad dial and the mainspring
    click is gone.

    Lyle: what movement do you have? I have several old blue springs for Longines, maybe I have it.
     

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