I'm back, folks! I certainly didn't mean to let this much time elapse since my last posting, but I assure you I have been far from idle. I have merely been working on a companion for the Columbia numerical listing of the last post, and here it is. This is a similar listing of all Victor Musical Masterpiece sets from its inception in 1927 to its demise in 1951 (actually it was merely transferred to 45 rpm, and then to LP, but that is beyond the scope of this listing), as before downloadable as a PDF document. There are quite a few gaps in the sequence, especially in the M-900s and the DM-1400s, so anyone with information on those entries which I have had to mark "unknown" is invited to come forward. Meanwhile, here's the link to this work-in-progress:
Link (PDF file, 624 KB)
Postscript: Someone did very kindly come forward, and so, as of March 5. 2012, the file has been updated with the new information that has been made available to me.