Shade guide for "Bio-Trey" silicate filling material

1965-1975

Shade guide for "Diafil" Silicate filling cement made for Dental Fillings Ltd.

1955-1970

Shade guide for silicate filling material

1890-1920

Shade guide for S.S. White filling porcelain

Shade guide for de Trey Bros., Zurich, 1910-1925

1910-1925

Shade guide for Filling Porcelain

1950-1965

Shade guide for "Petralit" silicate filling material

1950-1965

Sample from silicate shade guide

1890-1920

Sample from silicate shade guide

1890-1920

Silicate shade guide for S.S. White fillings

1950-1970