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CALCULATOR CALENDAR FOR RHYTHM METHOD, INSTRUCTION METER AND METER ENVELOPE.

节育安全期参考指示表

Shanghai Hygiene Press, 1956.

Published in 1956, the calendar is for 1959.


The front cover of a handheld calendar dated 1959 displays the months of the year in small blue type on a yellow background, with a blue border. Attached at the top of the rectangular calendar is a circular dial displaying numbers one through thirty.
The back cover of a handheld calendar dated 1959 displays instructions in blue print on a cream background, explaining how to use a calendar calculator to determine a women's ovulation cycle.

Calculator calendar and instruction meter for the rhythm method
(front and back).

The front of a small cream-and-brown envelope is shown, with images of three children carrying lanterns and marching single-file.
The back of a small cream-and-brown envelope is shown, with Chinese characters printed in brown on a cream background, dated 1956.

Envelope to hold calculator calendar and instruction meter for the rhythm method (front and back).