Constellation - Crown tube washer loose?

hi all!
I’ve this wonderful Connie, previous owner has bought a décagonal crown to his watchmaker fews month before selling it to me.

when I pulled out the crown, I’ve noticed something like a washer on the crown tube, which was loose (not attached to the crown).

I pressed the crown when back in place against the case, and the washer seems back against the crown, but not perfectly fitted. You can see it on the picture below.

Is it something common on those vintage crown?
I guess this washer is there for sealing, but should I let it as it is as long as I manage to avoid water and sweat? Or should I do something?

I really want to keep the décagonal crown

thanks for your help 😀

Thanks a lot @Archer

I’ll show it to my watchmaker when he will receive the new plexi.

knowing that those crown are not available anymore, and if it can’t be fix, do you think it is dangerous letting it like that?

i do not wear it everyday, and when I wear it, I take it off to wash hands, and do not wear it when the weather is too hot to avoid sweat.

I do not want to have something else than a décagonal... except if you thinks it cannot be worn like that or if you think I will damage the watch.

thanks

Thanks!
So I guess, like I did with my previous one, I’ll keep the décagonal even if I can’t fix it, and will wear it carefully 😀

I definitely cannot imagine having it with another crown model!