These designs have come up on here or the other forum before and I think in the past Allan Scott has given us the info. This in Caithness, and from the 80s era when they did the Edinburgh weights - hence the identical pastel canes. From what I recall these were done as blanks for commemorative type weights - as for example the engraved QE2 referred to above. Obviously the large clear base lends itself to having an engraved image or text. I think seconds escaped - I have one somewhere which has no engraving, and is not marked as C11G but with slipped canes that clearlywasn'g good enough quality