Paul:

Standard DIP style EPROMs and SRAMs are in packages that have leads that are spaced along each side on 0.1 inch centers. In the original times these devices had the rows of leads spaced 0.6 inches from one side to the other. Later on some vendors started to offer the SRAMs in packages that had the same pinout but the lead rows are spaced on 0.3 inch centers.

The board in the picture you linked looks to me like it has the more customary 0.6 inch wide lead spacing for both of its memory devices.

Hope that helped....(if not post then back).
Michael Karas