[nb-NO]Details[nb-NO]

A-317

Rectangular pasteboard frame in which slides two cards bearing names of months and a movable calendar. Brass eyelets help one position the cards within windows. Names of weekdays above columns of dates in calendar window. Table 1 correlates years with key letters. Table 2 correlates key letters to first day of each month. List of months with their number of days. Reference tables for 150 years, beginning in 1800 and ending in 1950.

"B. G. BUTTON & CO., Publishers, Waterloo, Iowa. Copyright 1890".

"To J J Medill with compliments B.G. Button."

1890

Printed Text, Black ink

United States

	Imperial(in)		Metric(cm)
Height			32.4
Width			27.5
Depth			0.3
Diameter
Circumference

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	Imperial(in)		Metric(cm)
Height			32.4
Width			27.5
Depth
Diameter
Circumference

	Imperial(in)		Metric(cm)
Height
Width
Depth
Diameter