Test glass set, c 1750
An early “Tollen” Test glass set around 1750 and it will be one
Of the first test glasses sets. The diameter of the glasses is 34 mm
And the frames are made from steal and will be closed by binding wire.
Some of the wire are still there. The box consist of 47 frames including
3 frames with one missing glass, two with two missing glasses and
Three with a broken glass.