Jesse, I quite agree with the first. On the second, it was a bit of an guess, however note the mark (of several for Charles Maas) for London is "C.M into a thin rectangle" not "C.M.", the mark on the pipe above is also "C.M & C" (or at least that's how I'm reading the fancy ampersand), but still C.M as the mark shown here,I'm not sure that the holes are screw holes. Could just be simple open work.
Not Charles Maas. Maas worked out of London and his mark was C.M., not C.M.&C.
http://www.silvercollection.it/DICTIONARYTOBACCONISTC.html
Also, in the linked article at pipes.org, the hallmark shown is yet another Charles Maas hallmark,which appears to be CM over MM... While the description of the pipe in the second link is,
Another thought, perhaps only the cases were made in Vienna, but labeled to give the pipes a fin de siècle cachet...?A LATE VICTORIAN SILVER MOUNTED PIPE, the briar wood bowl with silver mounted rim and stem, engraved with foliate detail, marks for Birmingham 1899, maker Cm&C, the bowl stamped ~CM Crown Pipe~ finishing with an amber mouth piece. 15cm(L) held within a fitted plush lined case marked CM Crown Pipe. Used but good condition.