They're weird. There are Imperial half's, 20 oz., Gallons and many others that are and aren't listed. I bought mine for $10 because I liked it at the time. I kept my sugar in it for a while but didn't like that measuring out was so difficult.
I looked it up later and the book was at $25-30. I doubt I'd get my ten back now. Maybe at a flea market but the shipping wouldn't make it worth while any other way.
I figure they'd be perfect for marbles, buttons, spare change (if there is such a thing) etc.
I like those Horlick's jars, only one I've got though is the little sample size, oddly enough. I don't see them often, and I don't think I've seen a single one in Ontario or Quebec. Not sure why.
As for that original one posted, I'm pretty sure that one's a store display. I don't remember ever seeing a bottom like that on a non-display bottle at that time period.