This is a balanced answer. You might well decide as a matter of business judgment to take the risk on this, not advertise it (to avoid trademark direct infringement) and risk the copyright infringement unless and until someone tells you to stop and then immediately stop, apologize profusely and claim innocent mistake. Stoppage would likely be a complainant's main goal against you. Just realize you take the risk of being chosen as "the example" to discourage other engravers, and that if that happens you might well be looking at major liability.