Experts at Heinrich Koehler

DIETER MICHELSON

Managing Director, Vice-president of the International Federation of Stamp Dealers' Associations IFSDA, Member of the "Académie Européenne de Philatélie” (A.E.P.)

MICHAEL HILBERTZ

Senior-Philatelist and Auctioneer, professional philatelist since 1987, with Heinrich Koehler since 1992

TOBIAS HUYLMANS

Philatelist, professional philatelist since 2003, with Heinrich Koehler since 2007