Changes

The part numbers on the chips seem to be scratched-off (or covered by paint). The "GI" logo on the large chip implies that is the polular popular General Instrument [[SP0256]](speech chip, probably the standard -AL2version (the ending L2 may be still visible?not sure there - on the photo it vanishes under the pot axis) speech chip from General Instrument. The clock frequency of the oscillator isn't visible (from the perspective how from where the photo was photos were taken).