noticed something odd when servicing cal 552

Greetings,
I just serviced an omega movement caliber 552 and got it running but I just noticed that I had no click and click spring on it when I put it together. It had been setting idle for a couple of weeks before I disassembled it and could not remember if it even had one to begin with. I don't remember losing any parts either. It has never happened to me before,or ever noticed it. but it is running after I tried to wind it. I notice a tap when the rotor moves possibly because the spring is slipping upon full wind. Is this normal? If so, how does one release the power on it. Very odd!!!

I would have thought so as it would seem absurd not to have it! What is strange is that It runs for a good 12 hours without a click! I have never had this experience before with any other watch which is what I find strange, prompting me to share this! I see It is a problem with a positive side effect🤔

Thank you! That answers my question. I was mostly puzzled on how to release power from the mainspring if the click is not there to be pushed back for the mainspring to unwind,

I also saw a post some years ago ( not sure where )that removing pallet fork is another way to release power as done with the Brac 2002 pin lever movement, as click is not s present or seen! I did not want to risk this method with the 552 by gambling the pallet fork,

Have just ordered a click, spring and screw from eBay and will need to wait until it arrives!
This was a great learning experience for me!