That Neep looks to have an apostrophe(')in the middle so maybe it's a contraction of two words. I've never heard of it.
Where did this unit come from? Seeing durum on the list ups my curiosity. I grew up in North Central North Dakota (sort of in Ande's area) and it was known as The Durum Triangle in the counties of Towner, Ramsey and Cavalier. But it probably wasn't the only area that grew durum.
I have relatives in Canada who call those units "Diskars" or "Diskers". In North Dakota we called them "one-ways" and they didn't have the seed boxes.