1957 Day-Date with 1555 calibre

[HansWillem]

Dear fellow Rolex-lovers,
I've got a question for you all. Hope you can help.
I'm thinking of buying a 1957 Day-Date. Mostly they come with a 1055 calibre.
This one has a 1555 calibre. But, to my knowledge the 1555 calibre was made from the year 1959.
What do you think? Is it possible to have a matching 1957 Day-Date with a 1555 calibre?
The numbers are 322XXX, which is from 1957.
If you want to see a similar watch I've found online, please check:
https://www.chrono24.com/rolex/6611-...-id4928095.htm
Regards to all, Hans

[Fredrik]

What model is it? If it is a 6611 then something might be fishy. If it is a 180X, then it is probably fine, cases may have been produced in batches an sat a while before the assembly of the watch.

[crowncollection]

Should have 1055


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[HansWillem]

Hi Frederik, the model is a 6611B. What are the chances ending up with a 1555 calibre?

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[joli160]

Hans Willem, I can't answer your question but imho is David the undisputed Day Date expert on TRF. Never seen anybody more knowledgable. If he states that it must come with a 1055 than I, like the vast majority of us here, consider that a fact.
Which means in my book that the DD you are looking to buy was not born with that movement.

[HansWillem]

Thanks guys for all the info! Knowledge makes owning a Rolex much more fun.
Hans