Chelsea Filter Magnifier Style_Accessory Weight including battery: 230g

Weight including battery: 230g

not only opens small screw-backs (18mm) but also large watches

Standard Presidium (GEMTEST-P2)

The spectacles are not included

and through the viewfinder you see a scale

Chelsea Filter Magnifier Style_Accessory Weight including battery: 230gSummary The original Chelsea Filter, as developed at the Chelsea College of Science and Technology in 1934. Do not confuse this with the many copies. Detail Many stones appear to change colour when viewed through the filter. Originally designed for detecting synthetic emeralds, nowadays the Chelsea filter is an invaluable aid to identifying many other gemstones. It can give an indication that you have an emeralds and aquamarines, though not a