Yeah, see the whole "80 cn misc. gear" thing from Moldvay? That's a thing that, prior to the appearance of Old-School (née B/X) Essentials circa 2018, could be called TSR D&D's best-kept secret. It seems to have gone totally under the radar in OSR circles prior. The impression I get from OSR blogs and forums is that most folks glossed over its existence in Moldvay Basic entirely and didn't even know about it until relatively recently.
Not least because it's not in BECMI, it's not in Holmes, and to my knowledge, it's not in AD&D or 3LBB either.