I have Omega Seamaster Cosmic but i need steel pre-owned one or at least good replica steel bracelet for it... I believe it is 19.5mm. Thanks and regards

 

That's probably 20mm. But you should measure the lug width.

You might try a diver mesh like this:



This is just a inexpensive generic I bought from Amazon. http://www.amazon.com/gp/product/B00MQ2VY8M?psc=1&redirect=true&ref_=oh_aui_detailpage_o08_s00

 

Thanks