These were chipco samples used at the I.C.E. (International Casino Exhibition) held at Earls Court London... and were the first chipco's shown to the UK & european casino operators...

The first chipco order for the UK followed in 1993 (Grosvenor County Clubs samples produced in 1991 [R10] & Grosvenor Clubs Limited samples in 1992 [R8]) see scan left & middle

First full order - Grosvenor Casinos 1993 (see scan right)

The other main operator Stanleys followed in 1995... the Stanley 25p for sale in the original post is from this order (all Stanley chipco chips withdrawn in 2004)