The discrepancy among movement, dial and case in that period is well known.
Some years ago I had a corrispondence with Longines about the same problem for this watch
View attachment 524871
View attachment 524872
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Dear Mr. Xxxxx,
Thank you for your e-mail as well as for your interest in LONGINES watches.
We have pleasure in giving you below the information we found in our old, hand-written production register regarding your LONGINES watch with serial number 3'632'622. It is a watch in silver 900. It has been invoiced to our agents in France on the 2nd July 1923 It is equipped with a movement calibre 11.84N.
Hope this information is convenient to you, and always at your disposal, I remain with my best regards.
Raymond Krebs
Archives & Documentation"
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Dear Mr. Krebs,
You say the watch has been invoiced in 1923 and the logo on the dial may be correct for that year. However, according to the serial number of the movement and case, the watch was probably manufactured in 1918 or something. How is it possible?
Thanks and best regards.
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Dear Mr. Xxxxxxx,
It is quite possible that this movement has been produced a couple of years before having been sold in 1923.
Best regards.
Raymond Krebs
Archives & Documentation"
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