Speedmaster 3313.53 - Gold Bezel?

Hi all, I’ve an Omega Speedmaster 3313.53 (pictured) which dates to circa 1999 (S/N 56271289). Trying to determine whether the original bezel is 18k solid gold. I’ve completed an internet search and there are sales ads which states that the bezel on this model is 18k but I’m unable to find anything conclusive. The watch came with newly-fitted gold plated pushers (old set of gold-plated pushers were included in the sale) and I’m assuming the crown is also gold-plated - but again if anyone can confirm that would also be most helpful. I’ve owned the watch for about two years. Thanks in advance, Paddy

Thanks so much for that - I was hoping you might check the Omega records for the serial number. Much appreciated, Paddy