The Extremely Rare assayer is Geronimo Velazquez who was Chief Assayer at the Potosi Mint from the short tenure of 1646 to 1647. He was one of the assayers in the Bolivia silver scandal where the silver content was slightly less on each coin. He was found Guilty and convicted of Malfeasance, Dubious Conduct, and Stealing from the king.
The countermark crowned L stamp is from a 3rd party assayer at the Potosi Mint. This Bolivia Cob is the size of a US Morgan Dollar.
It weighs 19.87 grams. The obverse has the Hapsburg Shield of King Philip IV of Spain. The reverse has the date, the crowned countermark , and the castles and lions in their correct positions. The coin was given the higher grade 3 by the professional graders. The grade 3 is based on today's grading standards, the strike, the ability to date the coin as 164X , the V assayer initial, and the overall condition of BOTH sides of this shipwreck coin.This silver eight reales Bolivia Cob is listed with No Reserve. The item "164X Dated withCrown Countermark Bolivia Cob 8 Reales + Maravillas Shipwreck" is in sale since Sunday, December 9, 2018. This item is in the category "Coins & Paper Money\Coins\ World\South America\Bolivia". The seller is "raymarcompany99" and is located in Springboro, Ohio. This item can be shipped to United States.