I did not read all replies here so forgive any repeat of information. The years 1942 thur 1945 Moss. made no rifles for the civilian market. They started military contract work in 1941 and were 100% into that by 1942 thru 1945. Any guns on the market in those years were made before 1942' Even in 1941 any sold were probably only assembled from parts.
There were two rifles made for the US Gov. The 44US mainly for the us Navy and the 42MB which most went to England as Lend Lease. 44US"s after 1945 were all civilian models. The list above show no Special models, or Spiegel models made for the Spiegel Mail Order C. in Chicago, Ill. This is a collector field in its own right! About 44 models, most with distinctive featchers. Many of the Letters following the numbers are written wrong and should be written as (a), (b), etc., if it is a capital letter M, B, etc. it has a whole different meaning. This list can and will lead to much confusion and misinformation.