In order to calibrate the photographic photometry, a number of CCD frames were obtained using the 0.9-m telescope at CTIO and the CF/CCD 2048x2048 camera with a standard set of B and V filters.  The reduced CCD photometry for stars which were also measureable on the SPM plates is given in a file separate from the main Catalog.  This file, spm_1_0.ccd, contains 791 stars, for which the magnitude distribution in V and B is shown above.