Experts at Heinrich Koehler
![](https://s3.eu-central-1.amazonaws.com/hk-files/files/files-local/pictures/team/2019_Michelson_Dieter_2.jpg)
DIETER MICHELSON
Managing Director, Auctioneer, Member of the "Académie Européenne de Philatélie” (A.E.P.)
![](https://s3.eu-central-1.amazonaws.com/hk-files/files/files-local/pictures/team/2019_Huylmans_Tobias_2.jpg)
TOBIAS HUYLMANS
Managing Director, Auctioneer, professional philatelist since 2003, with Heinrich Koehler since 2007
![](https://s3.eu-central-1.amazonaws.com/hk-files/files/files-local/pictures/team/2019_Hilbertz_Michael_2.jpg)
MICHAEL HILBERTZ
Senior-Philatelist, Auctioneer, professional philatelist since 1987, with Heinrich Koehler since 1992
![](https://s3.eu-central-1.amazonaws.com/hk-files/files/files-local/pictures/team/2019_Sch%C3%B6n_Cliff_2.jpg)
CLIFF SCHÖN
Philatelist, with Heinrich Koehler since 2019