the films are;
Kodak Ektachrome 160, type A date '1988' &
Kodak Ektachrome 160 type G date '1988'
Do you have any idea what the images may be like?
I agree information of John_P_Pytlak.
This is old film, from other side, this is color reversal. The color reversal film have more aged from B&W negative film.
You can have big grainy and low color, the sharpness can be low too, but,
i advise processing this film.
You can use E-6 chemistry, doubling of time of process and low temperature 25C.
Possible, the film can be processing with more high temperature 30..35C, need check.
I had experience process of Svema color reversal film ( CO-50D )and ORWO with old date ( 1985..1990 )
and had result.
Frankly speaking, i use chemistry with original Svema formula of solutions for Svema CO films.
I had not good color, but, this was historic events and any qaulity of image was great.