Dave Vincent asks about blower sizing [161108 MMDigest].  Organ Supply
Industries has guidelines for blower sizing for pipe organs in Chapter
8 of their catalog, available for download here:

http://www.organsupply.com/assets/CatalogPDFs/2014/Books-Misc.-Revision.pdf 

I'm not sure if this would translate well to a band organ but their
rule of thumb is 68 cubic feet per minute [cfm] for a rank of 61 pipes
at 7" water column pressure.  If your 200 pipes was approximately 3.5
ranks that would be about 240 cfm.

John Haskey