Here's a great Greg Brewer slide from November 3, 1984.
CN 2519 is taking a spin on the turntable in CN's Island Yard in Saint John, NB. It looks like Greg was shooting facing east, just south of the yard.
You can see where the turntable was, on this car control manual page.
CN 2519 was built in 1973 as an M-420(W) (W for wide) and was put into class MR-20a by CN. In 1986-87 it had its weight and fuel capacity reduced to enable it to run on branch lines. I believe those were reversed in late 1994.
CN Lines says it was leased to RaiLink of Southern Ontario in 1997, and retired from CN on February 13, 1998. It was sold to the St. Lawrence & Atlantic Railroad in New Hampshire in 1998, and sold again the Southern Railroad of New Jersey in early 2004. The site referenced still has it and two other ex-CN M420s on the roster.
Anyone know when the turntable was removed from the Island Yard? There is no trace of it now. Locomotives are turned on the nearby wye, just as the Acadian passenger train was when it was in operation.