ST.GOBAIN UNIT ISSUES ECU BOND WITH GOLD WARRANTS St.Gobain Netherlands, guaranteed by Cie de St.Gobain, is issuing a 75 mln ECU bond with gold warrants attached, due May 6, 1992 carrying a 4-1/2 pct coupon and priced at par, lead manager Salomon Brothers International Ltd said. Fees comprise 1-1/4 pct selling concession with 5/8 pct for management and underwriting combined. Listing is in Luxembourg. Each 1,000 ECU bond carries one gold warrant exercisable from May 6, 1987 until May 6, 1990 entitling the holder to purchase one ounce at an exercise price of 490 dlrs.