What is Hermes HSS?
Quoted from christies.com
Among handbag collectors, a custom-made Hermès bag is considered the ultimate status symbol. Custom-made pieces, known as HSS bags, feature a special horseshoe stamp to the left of the Hermès stamp inside the bag. The emblem might be petite, but it significantly increases the value.
The special custom-made service is offered to only a select number of top collectors, with bespoke creations typically taking six months to arrive — although some collectors wait for as long as three years.
Each season, a pre-determined selection of Hermès handbags can be customised using certain materials and colours. The Birkin, the Kelly and the Constance are the most popular styles among collectors. After deciding on the personalised combinations, the final design is sent for approval before production can begin.