It's hard to read, but looks like:
ST 70-44637 BF 00239 BDY
TR 178 B80 75 B PNT
10E 189479 540293
Fisher body style 44637
4 = Buick
46 = GS 455
37 2-door hardtop coupe
BF = body built at Fremont, CA
0239 = 239th 44637 built at Fremont
Trim 178 = Black Vinyl, available on styles 43437, 43537, 44437, 44439, 44637
Paint code 75 = Fire Red
B = black vinyl top
Option Codes
B80 = Roof drip scalp molding
10E = build date = October (10) 1969, fifth week (E)
189479 540293 = internal Fremont numbers