Vintage Rare Custom Hand Inlaid Tray for BS&B by Couroc of Monterey Circa 1950s

This tray is Mid-century circa 1950's and measures approx. 6" x 7". There are 3 embedded coins, and inlaid oil derrick, and gold flecks. The topmost brass coin reads "Republica Peruana", dated 1953 (worth $20-30), the middle coin reads "Elizabeth II Del Gratia Regina" (worth $15-25), the bottom coin reads "One Pice" in English and Indian, dated 1954 (worth $5-10). Original label on back reads: HAND INLAID TRAY made especially for the Friends of Black, Sivalls & Bryson, Inc. by Courac of Monterey Use as individual serving tray, canape tray, ash tray or for wall or cabinet display. Durable surface is impervious to alcohol, boiling water or checking "Black, Sivalls & Bryson (BS&B) began in 1892 building the first redwood storage tanks for the early Pennsylvania Oil fields. BS&B's capabilities rapidly expanded into the engineering and construction of metal tanks, separators and other leading oil and gas processing equipment." The Couroc Company, founded in 1948 in Monterey, CA, produced beautiful and often whimsical black resin trays and glassware made by skilled artisans. Couroc's founder, Guthrie Courvoisier, worked with a variety of plastics while working in the war effort during WWII. He used his experience and developed a proprietary formula of phenolic resin material that was not only durable enough to form into trays but was also impervious to alcohol and flames.