carburator questions

[kenparker]

Got this downdraft and want to put in on the new engine. Pictures do not show well but the manifold is a "Scalded Dog". I have been told it is a Srtromberg 81 but the numbers don't bear that out. On the outside the circle has a B and below is 1 1/32. On the inside - below the fuel line is a circle with a B and below that is a 1779.

Anybody out there recognize and identify this?
please don get mad at me for the copper fuel line - temporary.