Hi Bob,
Found, what I think, is your chips, in Gaming Archaeology Auction #16. This is the auction from Jan. 9, 1996. Pictures on plate 1-lot #10.1, 10.2, 10.3.
Description on page 6:

Croatia
10 $1 CC [Croatia International Casino] Cavtat, Croatia - (Circa: 1980's)
· Mold [Ewing] and [HHR]

Description: 1.1 $1oo - (Ewing) mold, tan with a gold hot stamp

1.2 $5oo - (HHR) mold, red with a gold hot stamp

1.3 $100 - (HHR) mold, black with a gold hot stamp
Comments: This assortment of three denominations offers two molds. Interesting, and the first we have offered. These three denominations are not easily found. We are not certain if this casino is still operating.
Condition: (Used - Lot of 3 pieces)……………………………………..($130 - $150)
*****PRICE REALIZED………..$57.50
Hope this helps, Tom