Unknown MSX internal PCB assembly, possibly a video board or display-related internal module from an MSX computer. 
 
The board is marked Sony DP-3 (1-629-289-11) and includes several integrated circuits and connectors. It has not been tested, and its exact function and compatibility are unknown.
 
The board is in good cosmetic condition with normal signs of use and age.
Suitable for MSX repair projects, restoration work, parts recovery, or vintage Japanese computer hardware collections.