Stowerbury denied that they could have been responsible on a number of grounds:
1) Their own strict quality control procedures shows that all samples taken were within the required specification. And Metronical had made interim checks at Stowerbury’s factory in that respect
2) They seriously questioned the voracity of Metronical’s testing procedure employed during the initial (suspect) tests.
3) In any event, Stowerbury also questioned whether the alleged 0.15% shortfall in purity would actually cause the product to fail the overall product performance specification.
4) Finally, Stowerbury contended that Metronical should in any event have double checked the metal purity prior to using it in production.