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synoptophore attachments
ORTHOPTIC INSTRUMENTS
synoptophore attachments
Europe: United Kingdom
1930s
metal; plastic
1999.3129
ORTHOPTIC INSTRUMENTS
synoptophore attachments
Europe: United Kingdom
1930s
metal; plastic
Moving picture attachments for a synoptophore. Depicted on transparent round discs set within metal casings with fully adjustable and extendable rod. One features a group of fish; the other a spiral pattern.
1999.3129