Vector Electronics - Packaging - Prototype Products
56 Gold plated edge contacts (28 each side) on 0.125"(3.175mm) centers. Interleaved buses one side only. Reverse side with edge contacts only. I/O mounting area for ribbon cable header.. Row and column legends provided.

4610-2 STD Bus, Vectorbord Plugbord
Vector Electronics & Technology, Inc.
11115 Vanowen St. North Hollywood, CA 91605, USA.