Shade guide for "Bio-Trey" silicate filling material
1965-1975
Shade guide for S.S. White filling porcelain
Shade guide for "Diafil" Silicate filling cement made for Dental Fillings Ltd.
1955-1970
Shade guide for silicate filling material
1890-1920
Sample from silicate shade guide
1890-1920
Shade guide for "Petralit" silicate filling material
1950-1965
Shade guide for Filling Porcelain
1950-1965
Shade guide for de Trey Bros., Zurich, 1910-1925
1910-1925
Sample from silicate shade guide
1890-1920
Silicate shade guide for S.S. White fillings
1950-1970