Need help on how to PROPERLY inspect this dimension

The .875 Radius is in print, but the location from the center of the square to the .875 R is out of tolerance by a couple thousandths. Is this calling out location or radius? And how would you check it?
[IMG]http://www.engineersedge.com/engineering-forum/attachment.php?attachmentid=1627&stc=1[/IMG]

Looks antique... What standard is the engineering drawing specified to?

70s haha... MIL-STD-100

Looks like the top radius feature center point is located relative to the center of the square feature and built in size to R .875 +0, -.010