It’s a later (late 1958-early 1960 probably) 2849 reference (2846 doesn’t have a date function) and looks fully correct with a very nice original dial.
I’m glad you’re keeping it and getting it fixed up. When you do so, don’t let anyone change any cosmetic parts as it is only original once. Find a recommended watchmaker that will perform a full service. If you post your location, members here may have recommendations.
Good luck!
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