after some harrowing gymnastics, i arrived at the section i store my "hose collection".
a super long time ago, my brother and i attended a dealer auction, and i purchased a box of hoses nobody else was interested in.
it contained a lot of garbage, but had a new roll of washer hose. there appear to be nothing but two ribs, 180* apart, on the hose.
it measures [as close as i could measure it without pushing it out of shape] .225 OD, x .090 ID, x .058[ish] wall thickness.
i don't know if this was any year specific, but i have used it on a bunch of years and models, up to newish years over these many years, so i don't think it's anything special.
it is way flexible, unlike vacuum hose, or tiny hoses used under the hood on most years.
i don't know if this helps or not, but it may give you a start.