I did look up the VAX 8600 as a result and it mentions a PDP-11 as being used for a console. Not sure if that's what the first board could be?Looks like the L0201 was the T11-based console for a VAX 8600 so some of the other modules may be from the same. The Hierarchical Storage Controllers (HSC) used the same form-factor, but I thought that they all were F11-based, not J11.