Founded in 1988 in Geneva, NGSA specializes in the field of prestigious numismatics. In over 35 years of business, we have built up an international clientele through our expertise and the organization of auctions. We are a benchmark in the field of collector coins. NGSA’s team is renowned for its reliability, speed and availability, and has also won the trust of numerous banking institutions in Switzerland and abroad. Today, our company is a key player in the market. For any evaluation, appraisal or offer to buy or sell coins, medals, our team is at your entire disposal.

Très bon accueil, convivial. Propositions de rachat pièces et/ou bijoux raisonnables. De bon conseil. Applique les valeurs du marché avec une marge raisonnable

Très bons contacts et disponibilité !

Since 2003, Atelier Lithos , led by Olivier Fawer , has specialized in stone cutting and the assessment of historic buildings . The studio works with all types of natural stone : limestone, molasse, marble, granite, gneiss, sandstone , and other traditional materials. We provide detailed expert assessments for structures such as castles, churches, historic monuments, old stone houses, and public buildings . These services allow you to: • obtain a clear cost estimate for restoration works (particularly useful before purchasing a property), • receive a precise technical report (stone types, condition, damage analysis, necessary interventions) that serves as a reliable basis for tendering to specialized contractors . Regularly commissioned by cantonal heritage and historic site authorities , Atelier Lithos – Olivier Fawer is a trusted reference for the restoration, preservation, and enhancement of stone-built heritage in French-speaking Switzerland.

Je recommande leur expertise, leur professionnalisme !

Très bonne entreprise. Très sérieux. Je recommande vivement.