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Vintage Alvin No. 450 8-inch proportional divider precision drafting instrument, made in West Germany.
Features adjustable proportional scales for lines and circles. Includes the fitted black case with green interior and the original directions for use sheet shown in the photos.
Pre-owned vintage condition with normal signs of age and use. A previous owner's name, appearing to read “J. McKelvey,” is lightly inscribed on the instrument near the Alvin marking. The case and instruction sheet also show age-related wear. Please see photos for overall condition and exactly what is included.
