Help identifying Strap & Buckle

Hi all,

I am the proud new owner of a used Speedmaster 57 Titanium on Titanium (331.90.42.51.04.001):

http://www.omegawatches.com/collect...a-co-axial-chronograph-41-5-mm/33190425104001

At some point, I may want to acquire the leather strap and deployant buckle from the Titanium on Leather model (331.92.42.51.04.001):

http://www.omegawatches.com/collect...a-co-axial-chronograph-41-5-mm/33192425104001

Does anyone know what the part numbers are for both the brown leather strap and the Titanium deployant buckle? I suppose the brushed stainless steel buckle may work as well. I am having a hard time locating the part numbers online.

Thanks much!

I believe the 41.5mm 1957 case uses a 20mm lud width leather strap, as opposed to the 39mm 57. I'd ask George aka Kringkily, or do a search for some of his pieces, as I'm sure he's sold a few of your model but with the leather strap and has pics and/or info on the correct model numbers. Best of luck.