Based on the prices of gold in 1967 and COMEX close 2016/08/12 (this assumes that gold has maintained its real purchasing power over time, which seems a reasonable assumption for a period of ~50 years, and that gold's purchasing power parity is a better measure of inflation than the official inflation rate, which is constantly revised/tinkered with by the government), BSR would have paid the equivalent of 4413 tr oz in 1967 (average price $34.95/tr oz). At COMEX close today ($1335.80/tr oz), that comes out to ~$5.9 million today. Those are some expensive machines!