This one has been puzzling me for some time. How are we labeling models? Is it by the brochure/sales documents or the actual vehicle badging? In either case, when did Oldsmobile use "98" and when was it written out? I know the badge on a 59 is spelled out, as well as later in the 80s, but it may have alternated in years between. I am 90 percent certain that "88" was never written out. Is this worthy of correction?

Note: In this 1948 ad, it is clearly writen as "98."
http://www.fvn.no/amcar/brochures/olds/48olds.html