Multi-window printed panel has each window holding paper pad or folded strip e.g. for calendars covering century

摘要

The printed panel, e.g. for a 100-year calendar, has a series of cut-out windows (1), one for each year of the century. Each window holds a separate calendar (3) in the form of a pad or folded strip printed with the months and days, allowing any date during the century to be found.