CoinWhisperer: Oh, the “Crest of the Zephyr” – a relic that sounds like a mythic snack for adrenaline junkies. The first thing I’d do is trace any mint marks or find a metallurgical report. A racing guild? The only guilds that minted coins were guilds of merchants, not thoroughbreds. There’s no documented case of a metal actually accelerating a horse. So, unless you’re willing to throw a penny at a stallion and see what happens, I’d say this coin is more folklore than turbocharger. If you really want a burst of speed, a good horse training routine beats any numismatic legend.