Digitized as Slab Sheriff by Match and Kerosene

There's also Arbor.

More info here:
http://typophile.com/node/70711#comment-412721

I´m looking also for historical facts — like original specimen scan [if possible, or more imagens about that]; in the node that @riccard0 mention has some nice facts!

Same basis, although not absolutely faithful to the original...

http://www.myfonts.com/fonts/nicksfonts/new-boston-wbw/medium/glyphs.html

FYI, the style itself is Italian; Two-Line Great Primer is the particular body size of the sample shown. “Italian” as a style dates from the early nineteenth century, when foundries typically offered a limited range of styles, and is curiously distinguished by its horizontal stress, rather than the vertical stress found in a truly Italian type such as Bodoni.