A key-ring consisting of a small nickel-plated steel chain approximately 3 cm in length, with, at one end, a ring of the same metal that can be opened and closed and at the other a small protective cover of plastic material (approximately 5 × 2,5 cm) containing a miniature address book, the cover of which bears a promotional message, shall be classified in the Common Customs Tariff within subheading:
73.40 Other articles of iron or steel:
B. Other.