PURPOSE: To obtain a handy guide for an overseas travel, by combining pierced circles, triangles, squares, pentagons, hexagons and stars, a protractor, conversion table of weights and measures, rapid-calculating conversion table of metric system and currency table of world's principal countries.

CONSTITUTION: In face of overwhelming popularity of cards of late, a ruler is added to pen, note-book as portable stationaries for outdoor use. As sometimes a man encounters a chance in which he misses a scale for measurement or a protractor depending upon his occupation and hobby, he decides to carry with him not only a credit card in his purse which he carries always, but as to a card-formed ruler combined with the protractor, etc. When he carries these things at all, and takes the remotest possible chance into consideration, he also carries a conversion table of weights and measures, table of rapid calculation, table of currencies of the world's principal countries for additional equipment to his overseas travel. By this, a handy guide for his overseas travel becomes available.