Hamilton Model 22 Box Crystal

Discussion in 'Chronometers' started by jshopper1, Aug 17, 2010.

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  1. jshopper1

    jshopper1 Registered User
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    Feb 24, 2009
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    This question deals with the 21 jewel size 35 WWII Model 22 watch in a base metal watch case, not the watch on gimbals in a larger wood box. Hamilton delivered the watch to the Navy in a small wood box. This small wood box was then enclosed in a larger wood box with a leather strap. The smaller first box had a round crystal (I guess that it is called a crystal) so that one could read the time without opening the small box.
    I now have the opportunity to acquire one of these watches. The small box has what I assume to be an acrylic crystal and this crystal is so brown that it is almost impossible to see the watch. The watch also has an acrylic crystal, but the watch crystal is not in bad shape.

    Here are my questions for the assembled experts. Did the original Hamilton box have a glass crystal? Is it difficult to replace the box crystal? I assume that the watch originally came with a glass crystal also. Are these larger glass watch crystals available anywhere? Has anybody had these same problems? What did you do?

    Thanks in advance.


    Dennis
     
  2. LloydB

    LloydB Registered User

    Feb 24, 2006
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    The small box (lid) has a green felt liner. When pulled away, it reveals
    the circular disk, held in place by small screws and washers. There
    should be very little difficulty replacing it with a similar disk from
    a local supplier. Assuming you can find the correct thickness of
    flat material, cutting a disk is not that difficult, whether glass or
    acrylic.

    Mine feels/sounds like acrylic, but I can't be certain. It certainly shows
    no sign of yellowing, so it's possible my own could be a replacement --
    hard to know.
     
  3. terry hall

    terry hall Registered User
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    Larry Crutsinger (spell) of Virginia advertises in the NAWCC Mart and is a source for information and components.
     
  4. Paul Regan

    Paul Regan Registered User

    Mar 4, 2003
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    Dennis, my 22 front cover crystal is very different then described by LloydB. My crystal encompasses the entire cover and is held in place via pinned strips of wood. My green felt is apparently held in place with glue. See photos. Paul
     

    Attached Files:

  5. HUDD

    HUDD Registered User

    Apr 11, 2004
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    Lloyd / Paul

    My M-22 box is the same construction as Paul's FWIW.

    I only recently acquired my M-22 on Ebay. Described as "running well" It turned out to have a broken balance staff, 3 cracked / chipped jewels, a scored mainspring barrel, an iffy 4th wheel and a couple of cross threaded cap jewel retaining screws ! Good eh ? We have an expression for this type of seller in the UK but I'm too polite to repeat it here !!! At least its given me an in depth understanding of how this chronometer watch was put together. It is truely a very fine piece of engineering and I hope to have it running as it should in the next few weeks. My saviours have got to be Larry C and Tom Mister of Dashto who have been able to provide me with the necessary replacement parts at very reasonable prices. If you read this, a big thank you both.

    Hudd
     
  6. Dr. Jon

    Dr. Jon Registered User
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    Mine is like Paul's. I replaced the yellowed cover with a new piece of plexiglass. I did this because I believed and still believe keeping a yellowed piece of plastic near it would increase the risk corrosion to the watch.

    If you want authenticity keep the old one in a plastic envelope reasonably far from the box with the watch.
     
  7. Paul Regan

    Paul Regan Registered User

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    Dr. Jon, was the felt secured with glue and was it difficult to remove? Thanks, Paul
     
  8. Dr. Jon

    Dr. Jon Registered User
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    It has been a long time but I think mine was glued. It was very easy to remove it. I reglued it with Elmer's milk glue.
     
  9. Paul Regan

    Paul Regan Registered User

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    Thanks Dr Jon, I'll remember that. Paul
     
  10. jshopper1

    jshopper1 Registered User
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    Thanks guys! Your advice is priceless. I really appreciate it.

    It sounds as if changing the crystal in the box cover is not a big deal.

    Dennis
     
  11. Don Dahlberg

    Don Dahlberg Registered User
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    Aug 31, 2000
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    If you have problems finding a crystal for the box you might try

    Ships Clock Cabinetry
    2421 Logan Way
    Salt Lake City, UT
    84108-2734
    http://www.shipsclock.com/index.html
    Sellick@burgoyne.com
    phone: 801-560-7029

    They make great reproduction clocks and might sell you a box crystal.

    Don
     
  12. HUDD

    HUDD Registered User

    Apr 11, 2004
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    Hi

    Here is a picture of my M-22 box as stripped down. Note the yellowed perspex "box window" It is also badly distorted. You can also see the box top with a new perspex window installed and held in place with the original hardwood beading and pinned. After trials with various glues to see which will bond the padded section back to the new pespex I've decided on "Bostick" clear extra strong all purpose. Not sure if available outside the UK ?

    Hudd
     

    Attached Files:

  13. Paul Regan

    Paul Regan Registered User

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    Great info Hudd, thanks for posting, Paul
     
  14. Bruce M

    Bruce M Registered User

    Jan 24, 2011
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    Does anyone have a PDF of the service manual for the M22?
     
  15. Don Dahlberg

    Don Dahlberg Registered User
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    Aug 31, 2000
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    Yes, members of NAWCC can check out a CD containing all the Hamilton service bulletins, material catalogs and military service manuals. See

    Call Number: MD 795 Ham 2009 CD
    Title: Hamilton Watch Company material catalogs, service bulletins, and technical data
    Author: Hamilton Watch Company.
    Publisher: Columbia, PA : NAWCC Library,
    Publication Date: 2009.
    Physical Description: 1 computer laser optical disk.

    Notes:
    Scanned at the NAWCC Library in 2009

    Don Dahlberg
    NAWCC Library volunteer
     

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