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• Orsini, Matt, Kyle Ponterio and Jeremy Bostwick, The October 2021 Collector's Choice sale: World and Ancient Coins, Costa Mesa, CA: Stack's Bowers LLC, 2021.
• Friedberg, Arthur L. and Ira S. Friedberg, Gold Coins of the World, From Ancient Times to the Present, 9th ed., Clifton, NJ: Coin and Currency Institute, 2017.
• Michael, Thomas, and Tracy L. Schmidt, Standard Catalog of World Coins, 1801-1900, 9th ed., Iola, WI: Krause Publications, 2019.
• Michael, Thomas, and Tracy L. Schmidt, Standard Catalog of World Coins, 1901-2000, 47th ed., Iola, WI: Krause Publications, 2019.
• Michael, Thomas, and Tracy L. Schmidt, Standard Catalog of World Coins, 2001-Date, 13th ed., Iola, WI: Krause Publications, 2018.
• Cuhaj, George S., and Thomas Michael, Standard Catalog of World Coins, 1601-1700, 6th ed., Iola, WI: Krause Publications, 2014.
• Byrne, Ray, Coins and Tokens of the Caribees, Decatur, IL: Jess Peters, Inc., 1975.
• Stickney, Brian, A Monetary History of Central America, New York: American Numismatic Society, 2017.

This specimen was lot 71854 in Stack's Bowers Collector's Choice sale (Costa Mesa, CA, October 2021), where it sold for $5,520. The catalog description^[1] noted, "PAPUA NEW GUINEA. 500 Kina, 2020. PCGS PROOF-70 Deep Cameo. Fr-Unlisted; KM-Unlisted. Mintage: 400. AGW: 1.0 oz. A fairly RARE type given its small mintage, this flawless specimen radiates with intense appeal and features the famous birds of paradise design first utilized on the late 19th century coinage of German New Guinea. Includes original box of issue and pamphlet with serial number 91/400."

• Papua New Guinea 2020 500 kina KM unlisted.

This specimen was lot 72076 in Stack's Bowers Collector's Choice sale (Costa Mesa, CA, October 2021), where it sold for $240. The catalog description^[1] noted, "PHILIPPINES. Mint Error -- Struck Off Center -- 10 Cents, 1966. NGC MS-66. KM-188. A flashy, untoned, and mesmerizing Gem, struck 15% off center with a prominent lip on the obverse."

• Philippines 1966 10 centavos 2 g, copper-nickel-zinc, 18 mm diameter, m. 110,000,000.

This specimen was lot 72218 in Stack's Bowers Collector's Choice sale (Costa Mesa, CA, October 2021), where it sold for $900. The catalog description^[1] noted, "SAN MARINO. 50 Euros, 2005-R. Rome Mint. NGC PROOF-70 Ultra Cameo. Fr-98; KM-471. Mintage: 3,914. AGW: 0.4667 oz. Achieving a perfect grade level, this exquisite piece from the Italian microstate of San Marino celebrates International Peace Da."

• San Marino 2005-R 50 euros 16.13 g, 0.900 fine gold, 28 mm diameter.

This specimen was lot 72227 in Stack's Bowers Collector's Choice sale (Costa Mesa, CA, October 2021), where it did not sell. The catalog description^[1] noted, "SOUTH AFRICA. 2-1/2 Shillings, 1924. London Mint. George V. NGC AU-53. KM-19.1. A well struck coin with abundant remaining luster and patchy toning throughout."

• South Africa 1924 2-1/2 shillings 14.14 g, 0.800 fine silver, 32.3 mm diameter. m. 984,000, struck 1926-30.

This specimen was lot 72228 in Stack's Bowers Collector's Choice sale (Costa Mesa, CA, October 2021), where it sold for $216. The catalog description^[1] noted, "SOUTH AFRICA. Penny, 1928. London Mint. George V. NGC MS-63 Brown. KM-14.2. Mostly even and silky brown surfaces with speckles of original red scattered about. A nice example to add to your copper collection."

• South Africa 1928 penny m. 386,000, struck 1926-30.

This specimen was lot 72244 in Stack's Bowers Collector's Choice sale (Costa Mesa, CA, October 2021), where it sold for $168. The catalog description^[1] noted, "SOUTHERN RHODESIA. 1/2 Crown, 1936. George V. PCGS MS-62. KM-5. Possessing superb luster for the assigned grade."

• Southern Rhodesia 1936 1/2 crown 14.14 g, 0.925 fine silver, m. 518,000 + proofs. struck 1932-36.

This specimen was lot 72465 in Stack's Bowers Collector's Choice sale (Costa Mesa, CA, October 2021), where it sold for $1,800. The catalog description^[1] noted, "UNITED ARAB EMIRATES. Sharjah. 100 Riyals, AH 1389/1970. Karlsruhe Mint. NGC PROOF-67 Ultra Cameo. Fr-2; KM-9. AGW: 0.5998 oz. Struck to commemorate the 200th anniversary of Napoleon Bonaparte's birth, this superb Gem features a flawless cameo contrast and no sign of toning or spots."

• Sharjah 1970 100 riyals Fr-2 20.73 g, 0.900 fine gold, m. unknown. also KM 10 (Bolivar), KM 4 (silver 5 riyals).

This specimen was lot 72467 in Stack's Bowers Collector's Choice sale (Costa Mesa, CA, October 2021), where it sold for $228. The catalog description^[1] noted, "UNITED ARAB EMIRATES. 50 Dirhams, AH 1400/1980. Valcambi Mint. PCGS PROOF-69 Deep Cameo. KM-7. Commemorating the international year of the child, this practically flawless example features a very sharp cameo contrast with no evidence of toning, haziness, or fog."

• United Arab Emirates 1980 50 dirhams 27.22 g, 0.925 fine silver, m. 8,031.