I bought them from Liolios optics to be sure of their authenticity and quality. They are perfect in both design and quality, they come with a case, a cleaning cloth, a certificate of authenticity, and instructions from the manufacturer. The service from the optics was fantastic; I made a change to the original model and it was done quickly and immediately, both the exchange and the credit of funds. They keep you informed via Viber about every update and are always helpful and accommodating. Very satisfied!