Omega OEM leather strap and buckle size.

Hi guys,

I've been trying to find out the size of the Omega Speedy (sapphire
311.33.42.30.01.002) OEM leather strap and buckle size but have read different info, I know that the Hesalite version comes with 20/16 strap and buckle but want to know if the sapphire comes also with 20/16 or 20/18 since if it comes with 20/16 you're pretty much limited to the strap that comes with it but if it's 20/18 you can try different straps like the Snoopy etc.

Please can anybody that has this info help, I've seen pics of the sapphire strap and to me it looks like it tapers less than the Hesalite but that's just an appreciation , I can be wrong.

Thanks.

If it comes with a 20/18 strap , I'm under the impression that the D. buckle is the same used for the snoppy an will only need the strap and not a new buckle, Is that correct?

Thanks.