Those crowns are all more modern replacements. Maybe try looking at watches that are sold by more than this one seller, who aggressively "preps" his watches. When they are all so shiny, you need to be a bit careful. Or if you're determined to buy from him, than just do it. Otherwise, sit back and allow members to give their opinions without attempting to refute every criticism.
This is the crown that came with the 2505:
Sizes:
Diameter - 5.35-mm
Depth - 2.25-mm
Tube size - 2.0-mm
Tap size - 1.2-mm - #6
There should be no gap, the notched space should be filled with crown, on the first watch the crown is too small.
The last one above looks correct.
Crown is wrong.
I'd want to see the dial under loupe, personally. Also that case looks quite polished in that light. Whole things looks a bit "prepared"
Thanks! My watchmaker has just inspected and told me the dial is original, not repainted or anything, but he has no idea about correct configuration, mark or anything.
Watch is from 1952.
Case probably looks more polished in the studio set pictures.