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Index arm for octant or sextant
index arm
INSTRUMENTS - OCTANTSoverall: 9 3/4 x 2 1/2 in.
Index arm for octant or sextant, with 2 screws on one side, scale 2 4 6 8 10.
1971.31.2
Index arm for octant or sextant, with 2 screws on one side, scale 2 4 6 8 10.
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