This is a button shoulder strap by Stefan Cooke!! It's being sold because the seller's style has changed. I think it's priced very low!! This is an authentic item. Please be aware that many fakes are circulating. The authentic ones have the Stefan Cooke brand logo on the strap attachment gradually increasing in size from left to right. Those with evenly spaced logos are fake, so please be careful. This item was quite popular among fashion enthusiasts in the past. As shown in the last photo, the metal parts of the strap that attach to the bag have some scratches due to wear. Purchased from matchesfashion. I believe it's from the 20ss collection. Instant purchase is available. No price reduction.