In 1981, Guido Craveri founded Investphila SA, with head office in Lugano. In 1987, in partnership with the Harmer family, he opened the Swiss branch of the prestigious English auction house with the name Harmers Auctions SA.
In March 1991, the company achieved its first major international success when it sold the famous 2nd May Cover for the record sum of 3.4 million Swiss francs, which for many years was to remain the highest ever paid at a public auction for a stamp.
In the same year, Craveri took over the shares of the English partner and changed the name to Guido Craveri Harmers Auctions SA. After four successful years and thirty auctions involving such collections as “Levante”, “Romagne”, “Sardegna”, “Cresta”, “Liphschutz – Russia” and “Shaida G.B.”, from 1995 onwards the company concentrated on sales by private negotiation.
In 1997, the Board of the Smithsonian Institution of Washington, which controls the main US museums, nominated him Chairman of the Council of Philatelists of the National Postal Museum (the biggest and most visited postal museum in the world), and he remained in that office up to the expiry of his second and final mandate. By way of acknowledgement and thanks for the work carried out, he was nominated Emeritus Chairman in 2004.
At the end of 2002, Guido Craveri Harmers Auctions SA returned to its original name of Investphila Sa, and confirmed its place as leader in the international philatelic market. In October 2005, Guido Craveri and his company resumed their sales activity through public auctions, achieving many successes and new records.
On My 27th, 2006 Guido Craveri was awarded the Philatelic Achievement Award by the Smithsonian National Postal Museum in Washington. This prestigious award, the most important in the world in the philatelic field, was awarded as for his important initiatives within the Philatelic Council and for having influenced the creation of new standards and point of view related to the world of philately.
From 1998 to 1994 and from 2005 to June 2011, Investphila published 58 prestigious catalogs of which 55 related to public auction sales and 2 to private treaty, deserving to be counted among the leading philatelic auction houses in the world.
In September 2011, Investphila signed a commercial partnership with the prestigious English group Spink, which continues today.