SHIPWRECK OF THE "LA CAPITANA", 1654
A very nice example and rare, Spanish New World Silver 4 Reales COB with visible devaluation "CROWN" over "F" mark. 
Coin # 1283 (London Coin Galleries, Inc.)
Mint; Potosi, Bolivia
Date; c. 1651-52
Reign; PHILIP IV
ASSAYER; E
Grade- II
WEIGHT- 7.4 grams.
With original Certificate of Authenticity as well as a COA from London Coin Galleries, Inc.
TTI-569922