zyxwv99 said 
1904 letterhead looks like Heavy Copperplate Gothic Extended except flat-top ampersand and lower bowl on B is bigger than upper bowl
yeah, "R" is a bit diff too.
Anyway, I think Engravers, Sweet Gothic, Blair, Sackers... actually fits better but... they don't have serifs

(update on-the-fly - there is a serif version of Sweet Gothic)
From SashiX suggestions, Engravers' Gothic has a 'flat topped'
ampersand.
There is a rather new digital serif one with that ampersand but it isn't by far as wide as the one in the pict. Don't think that cut has ever been digitized.
Update
Taking into account that this sample dates back to 1904 ad that the image is taken under an angle and with a wide angle lens, hence the distortion, the typeface used can very well be the Schriftguss AG's Mimosa halbfett or a version thereof cut in the USA.

Thanks for all the replies. I have followed up on them. Engravers' Gothic has the 3 elements missing in Copperplate Gothic, but unfortunately lacks the Copperplate-style serifs. It turns out that both Engravers' Gothic and Copperplate Gothic were released by the American Type Founders Company in 1901. I think Engravers' Gothic pairs up well with Copperplate Gothic.
Here's a link to a page with photos of the original document. (If the link doesn't work, try Vintage-1904-Abercrombie-Fitch-New-York-LETTERHEAD on ebay.) If you scroll way down, there are more photos.
http://www.ebay.com/itm/Vintage-1904-Abercrombie-Fitch-New-York-LETTERHEAD-Ezra-Fitch-Lake-Mohonk-/161008814537?nma=true&si=T82zTNys9mVz%252BbQ2JSTuVcg4OoA%253D&orig_cvip=true&rt=nc&_trksid=p2047675.l2557
Also, the letters seem to be raised. Apparently engraved, although I can't see any sign of it on the back of the page. I'm looking to see which engraver might have done the work; the Manhattan Engraving Company seems like a possibility.
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