Help identifying flat feet crown

Hi,
I found some vintage nos flat feet crowns and i could use some help to identify for wich model these are.

Thanks to this forum i found out that one with diameter 6.7mm and stem 1.2 is for a Railmaster.

Another one is 6.2mm diameter, 3.1mm height for stem 1.2mm and has 24 teeth.

And i have one the same size but this one has 32 teeth and is for stem 0.9mm with long tube.


The pink gold is 6mm diameter, 3mm height, stem 0,9mm, long tube and 32 teeth.



Any help will be much appreciated!
Thanks!

I believe those flat foot crowns came on certain speedmasters, railmasters and seamasters although not sure what exact models, hope this helps.

A 1,2 mm. stem is for 30 mm. movement thus for a Railmaster.
Second looks like a Speedmaster crown.
Third one I don't know, probably a Seamaster Chronograph.

Thank you for the help

Can anyone help me out and tell me if this is a speedmaster crown or any other model?
It’s 32 teeth, 6.45mm diameter and 3mm height excluding the tube, for 1mm stem.