The chip you show is interesting, chips with the same hot stamp are
attributed from British Columbia Canada , the strength of the attribution
based on several sets coming directly out of an casino/card room in Victoria
B.C. in the mid 1980's . There were no chips available like yours at the time,
and this adds a bit more mystery to the listing. Check under the Global
Chipguide in B.C. under Caesar's Canadian Casino.
I would be interested in one of these chips if you have one available.