New crown for vintage Heuer Carrera 2448.

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Hello and good afternoon,
I recently purchased a vintage Heuer Carrera 2448 which has a wrong worn crown. I found one online which is suitable for a tap 10 stem (0.90mm). I found also a stem for valjoux 72 which is available in tap 7 and tap 10 (1.2mm). Does this mean both the 0.9 and the 1.2 stem will fit on a valjoux 72, and size just depends on the crown you want to attach on the stem?
Sorry if I explained myself not clear due to language.
Thank you!