Lighthouse Watermark Detector - Black plastic dish
Small plastic bowl to detect watermarks on stamps.
Use: Put the stamp in the bowl, face towards the bottom. Pour a few drops of ground benzine on the back of the patch.
The black background of the bowl makes it possible to highlight the watermarks.
Dimension: 75 x 50 mm.
75 x 50 mm.
Leuchtturm original products made in germany.