OMEGA 2506, Jumbo 30T2 - Crown question

Hi,


I recently acquired my first vintage Omega timepiece, and I have a question regarding the crown's positions. Presently, my watch seems to have only two positions: manual winding mode and hour-setting mode. I'm unable to secure the crown in place, and there appears to be a gap between the case and the crown, leading me to suspect that there might be a third position for locking the crown.

I'd appreciate guidance on whether there might be an issue with the crown or if this is normal behavior. Should I consult a watchmaker to address this, or is it within the expected functionality of the timepiece?

Please see attached pictures.

Any help/advice is appreciated
Thanks

Thank you Dan, I will bring it to a watch maker to have that sorted ASAP