Compass Box (for deflection magnetometer or tangent galvanometer) ‘PSAW’ |
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| Compass Box (for deflection magnetometer or tangent galvanometer) ‘PSAW’
(1078 C) |
| Consisting of a bakelite moulding case with white aluminum dial graduated 0 – 90° four times. The magnet with aluminum pointer is pivoted at the jewel so as to move frictionless
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