This is a IWC style Buckle,Sourced by Strapmeister .4 types to choose from.
1-Brushed stainless steel buckle.
3-Rose Gold plated
All 4 clasp is Not stamped & suitable for IWC straps & other watch straps with similar strap size/width
Its Available in 2 size which is 18mm & 20mm Strap width . Price is for the buckle only .Shipping is free to most places.