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Hi Cathl
That is a you know a Longines 'WEEMS' watch. It was designed by Lieutenant Commander Weems. (US, Patent number:2008734)
Weems work in navigation became so important and invaluable, that he isa now known as the 'father of modern navigation.'

In 1930 Longines agreed to manufacture the 'weems' watch

Charles Lindenbergh used the 'weems' design on his famous flight. He then (Lindenbergh) took the basic design added scales to dial and bezel to calculate the hour angles of the sun, and stars. There By creating the 'Lindenbergh Longines Hour Angle watch'
That IS what you have. I never seen one before.

If you can give me the serial numberof YOUR watch, I will find out ALL the details about it for you.
Including exact manufacture date and to whom (and where) it was first sold.

Thanks for posting a very unusual watch.

Adam
 

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Hello Adam...the SN is 7320128 and I'm including a photo of the movement...thanks again, Cathy View attachment 17324

You gave me WRONG serial number:

See reply from Longines

Dear Mr. Harris,

Thank you for your e-mail regarding your Longines watch :

#serial number identify : pocket watch in silver
Movement caliber 21.54 ZZ
It was invoiced to Messrs Grosjean, at that time our agents for the Sweden, on 19.11.1910.

Please check serial number, thank you.

Best regards,
 

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Here you GO!!!

#serial number 7'320'128 identify :

Wristwatch in stainless steel with leather band, reference 4320, Lindbergh collection
It has a movement caliber 12.68N
It was invoiced to Messrs Longines-Wittnauer in New-York, who were for many years our agents for the USA, on 08.12.1947.

Best regards,

1947 VERY COOL>
 
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