I'm pretty sure it's this one: https://uk.farnell.com/murata/cstce8m00g55z-r0/resonator-smd-8-0mhz/dp/1615352?ost=1615352
@Gordon started
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
I'm pretty sure it's this one: https://uk.farnell.com/murata/cstce8m00g55z-r0/resonator-smd-8-0mhz/dp/1615352?ost=1615352