Those are good chip. They were quite rare (to me anyway), till a group of us purchased, on eBay in 2002, a fairly large quantity of all four chips. (I looked, but I can't find those chips, but I am sure they are somewhere at my place). I ran an auction for them in 2002. I said in part:

This lot consists of 4 neat antique, rare advertising liquor codes. Already in the book are PYEP for Gilbeys Port and PYER for Gilbeys Rum. on page 333. Just now discovered are the Dry Gin and Sprey Royal chips, not coded yet, but sure to be coded.. Note that each color has its own code. For example, all the red chips are Dry Gin; all the green chips are Rum; etc; etc.. These are thin wood chips with the advertising message on one side (the reverse is plain). The chips are pretty big -- 1-5/8 inches.

I see that the Spey one was coded -- PY-EQ. Not sure about the other one.

Robert