Well I finally got around to taking a picture of my birth year and quarter razor that I got for Christmas. It's a 1981 B-4 Gillette Black Beauty Adjustable.
View attachment 713497
View attachment 713497
Not a whole lot of choice in W-3, but I have tracked down two Black Tips, one in steel, the other in Aluminum handle version ..
According to the US Gillette Dating Information Wiki 1988 was the last year.