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I have just purchased this one with what they say is the original crown. Haven't received it yet. Will post better pics when I do.
Annnnnd it's back to the watchmaker because, after setting the date, I pushed the crown back in and was unable to wind it. Maybe next week. 🙁
crown used on cases’ references 9000 to 9011
crown used nowadays on our “Conquest Heritage 1954-2014” collection
, can be found on cases’ references 9020, 9021, 9023, 9024, 9025, 9026, 9027, 9028, 9032, launched between October 1959 and June 1960.
and
are found on references 9022 (October 1959), 9027 (special edition for Italy
), 9040 (February 1961), 9041 (January 1962), 9042 (February 1962), 9044 (February 1961), 9045 (March 1965) and 9046 (April 1967).
Email me the .pdf file when you have a chance - I'll add it to my ever-growing Longines file. If you still have the information on the 294 / 291 factory frankens that would be cool to have also.a picket fence with rounded off tops wrapped around the side
And when this becomes the standard terminology.OF is where the legend began 😎

Thanks for confirming what we had long suspected: date at 12 = scalloped crown. Nice job Anders, and thanks to Jennifer! 👍
Thanks for confirming what we had long suspected: date at 12 = scalloped crown. Nice job Anders, and thanks to Jennifer! 👍
Given the ad in an earlier posting by MMMD, I would instead wager that date at 12 + produced in 1961 or earlier = scalloped crown

Some more info
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Dear Anders,
Indeed, we also have seen the watch have been restored (with the small engravings on the inner side of the back) and the crown has probably have been changed at that time.
Yes, we do have some in our repair shop but you will need to send us the watch for an analysis and for an estimate of the costs….
Best regards,
Jennifer
Given the ad in an earlier posting by MMMD, I would instead wager that date at 12 + produced in 1961 or earlier = scalloped crown