The Optimist Pram - International version
originally designed by C. Mills and re-drawn for international use.

These plans sheets have measurements in milimeters.

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The original Mast was 7ft. 6in long = 2286 mm
and was a round pole max. diameter 1.875 in. = 47.675 mm

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Opti 1948 first page of plans 1948 version in inches.

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