The ("olympic rings") one reminded me of my old boss. Who did all the engraving. A customer requested a lamicoid. He wanted something to the effect of "9999999a" Explained it to my boss over the phone as 9999999 with a small A on the end.
Customer gets a lamicoid with "9999999 with a small "A" on the end." Al spelt out! hahaha Customer framed it. Got his engraving done somewhere else from then on. Priceless.