Does anyone know any background or history about these H&C Playboy Club chips?

I own a Playboy Club Ten Shillings chip (shown below) but it is not a H&C mold.

Was wondering if the H&C mold chips were from a newer or different "rack"??? Were the H&C chips actually used in the casino??? If so, does anyone know when? Sounds like these are part of someone's "home set"...