Going to necro this thread...
The Precoce D'Argenteuil is a fairly old French variety, that also goes by 'Early Argenteuil'. It is listed in Hexamer's Asparagus (1901) and probably others, under just Argenteuil or 'early'. It is also probably the same as the Argentenil Early Giant on the original listing in this thread, as I think that 'n' is a mistake.
Here is the listing from Hexamer...
Quote:
Argenteuil. — Of this three sub-varieties are recog-
nized — the early, intermediate, and late; and these are
the kinds grown almost exclusively in the vicinity of
Paris, France, where its culture and improvement have
steadily developed for centuries. Under good culture
the late Argenteuil produces stalks from three to six
inches in circumference, at eight inches below the tips.
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I also came across a few references that state the variety being grown at the parsonage garden in Old Sturbridge Village is probably Barr's Mammoth.
And if that 'feral' variety has done anything, I'd like some seed, if possible.
Also, Connover's Colossal is available from Bountiful Gardens.