Made of steel, half red & half blue ( for N & S ) spray painted, with keepers.
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Plotting Compass Glass for Physics Lab – Magnetic needle mounted on pivot in aluminium case with both sides glass with cross lines at 90°. (a) 20 mm (b) 25 mm (c) 50 mm.
Size: 50 x 10 x 5 mm
Mariner’s Compass for Physics Lab – Magnetic needle in Aluminium bowl with gimbals in polished wooden box with sliding cover, dia 75 mm approx
50 mm x 50mm magnetic square rubber sheet.
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