The shot of the lower looks like this one, identified as a 1937 single:
at http://www.joeoutboard.com/forsale/thorsingleforsale.htm
As opposed to the 1939 streamliner:
And 10519 fits in the 1937 single serial number range posted here: http://aomci.org/forum/viewtopic.php?t=12124#p63946