Brochure is acceptable condition and has a tear on top corner. Letter is from 1966 and in good condition. LEAK is the brand name for high-fidelity audio equipment made by H. J. Leak & Co. Ltd, of London, England. The company was founded in 1934 by Harold Joseph Leak and was sold to the Rank Organization in January 1969. During the 1950s and 1960s, the company produced high-quality amplifiers, radio tuners and loudspeakers (the LEAK Sandwich). Letter is one page. The sales ad brochure is a front and back sheet of paper.