Amendment 1 of ISO 1651/1974 concerns cover page and pages 1, 2 and 3. Modify the general title as follows: 'Hardmetal (carbide) core tube drawing plugs - Dimensions'. On page 1, clause 1, replace the first and second sentences by new ones. Pages 2 and 3: modify each title (clauses 2 and 3) in accordance with the titles given in this amendment.