Bought a black SMPc on rubber but want to buy the smaller size of the strap from Omega. Serial no.?

As title says. I bought a SMPc this week as my first ever luxury watch / chronometer watch / watch I paid more than £500 for etc. etc.

Loving it - but the buckle of the rubber strap is poking the hell out of me. Think its sitting in the wrong place and needs to sit a bit more centrally. How do I source the serial number for the smaller strap? I'm new to the OEM Omega marketplace and there isn't a catalogue or anything online that I can refer to. Help is appreciated because I want to wear this watch every single day.

Some here will know the actual strap number but you can only order them through an authorized dealer or watchmaker anyway. So you should go to the dealer and let them order the right one for you

I ordered a Bonetto Cinturini and a Zealande because I did some digging and don't fancy waiting the rest of my life to get an OEM Omega strap with a buckle!

I've never used this adjective to describe a watch/watch strap combination before but that is... delicious.