Cuba, 1993 AD., second republic, Prehistoric Animals Series, non circulating issue "Apatosaurus", 5 Pesos, KM 405.

Cuba, second republic, Prehistoric Animals Series series, Apatosaurus, non circulating commemorative issue, 1993 AD.,
5 Pesos (ø 30 mm / 6,00 g), 0.999 silver, 6,00 g. theor. mint weight, mintage 20.000 , axis coin alignment ↑↓ (180°), reeded edge,
Obv.: REPUBLICA DE CUBA / 5 PESOS / AG 0.999 CIUDAD DE LA HABANA 6 G. , Havana's coat of arms within wreath.
Rev.: ANIMALES PREHISTORICOS / 1993 / APATOSAURUS , Apatosaurus standing right, mint mark key above five-pointed star above date in r. field.
KM 405 .

Year / Mint Mark / Mintage
1993 / key above five-pointed star / 20,000 (proof issue)

Apatosaurus (meaning "deceptive lizard") is a genus of extinct sauropod dinosaurs that lived in North America during the Late Jurassic period. Othniel Charles Marsh described and named the first-known species, A. ajax, in 1877, and a second species, A. louisae, was discovered and named by William H. Holland in 1916. Apatosaurus lived about 152 to 151 million years ago (mya), during the early Tithonian age, and are now known from fossils in the Morrison Formation of modern-day Colorado, Oklahoma, New Mexico, and Utah in the United States. Apatosaurus had an average length of 21–22.8 m (69–75 ft), and an average mass of 16.4–22.4 t (16.1–22.0 long tons; 18.1–24.7 short tons). A few specimens indicate a maximum length of 11–30% greater than average and a mass of 32.7–72.6 t (32.2–71.5 long tons; 36.0–80.0 short tons).
More on https://en.wikipedia.org/wiki/Apatosaurus