Goony, As you note, there's a 1300 number range between the serial number SV 811832 used in SCSW and Mike's # SV813132, however I think the mention in the SCSW is regarding the highest numbered nickel gun. I have noted several dozen SV numbers, over the years, that are higher than SV 811832. I recently sold SV812307, 4 in. blue, Magnas and plugged hole, NIB, shipped Feb. 1946. Ed