I honestly don't know the backstory, what little I do know I'd guess it's a supposed a holdover from the UCV, which the SCV is supposed to be a successor to.
I supposed because the SCV claims to have been in existence since 1896, but if one looks into it, the original SCV kinda died with the UCV around WW2, (same with SUV) and got resurrected during the Centennial.
Which I take issue with many stubborn numbskulls in the SCV over beliefs like it's been around unchanged since 1896, and that the logo comes from the UCV or dates to 1896, when that alone dates to I think the early 1970's?
SCV history can be incredibly messed up to track….