Keywords: Portugese minesweeper NRP Graciosa (M417) in 1955.jpg The Portugese minesweeper NRP Graciosa M 417 during trials on Lake Michigan USA in June 1955 The ship shows the U S Navy designation AM-486 later MSO-486 but was built for Portugal Graciosa was built at the Burger Boat Company Manitowoc Wisconsin USA She was commissioned on 15 August 1955 and scrapped in 1973 6933471 1955-06-15 U S Navy Bureau of Ships PD-USGov NRP Graciosa M 417 Portuguese minesweeper NRP Graciosa (M417) in 1955.jpg The Portugese minesweeper NRP Graciosa M 417 during trials on Lake Michigan USA in June 1955 The ship shows the U S Navy designation AM-486 later MSO-486 but was built for Portugal Graciosa was built at the Burger Boat Company Manitowoc Wisconsin USA She was commissioned on 15 August 1955 and scrapped in 1973 6933471 1955-06-15 U S Navy Bureau of Ships PD-USGov NRP Graciosa M 417 |