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Hamilton quality - The 10/12 sizes. "Click" to Login or Register 
Matthew E. Sutton
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posted
...So the 918 was manufactured after the 920 and 922? Did the 918 have the elinvar hairspring? (1941).
 
Jerry Treiman
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posted
The 918 was after the 920. Production began a few years after the 922 but then was roughly concurrent. I do not recall ever seeing one with an elinvar hairspring.
 
Matthew E. Sutton
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posted
Here is a 918 since the image at the top has expired.

 
Matthew E. Sutton
Picture of Matthew E. Sutton
posted
Stem view (The case was open in the back, so a gap appears)

 
Matthew E. Sutton
Picture of Matthew E. Sutton
posted
Front view

 
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