According to
Sears Sewing Machine Manufacturer list addition
158 = Maruzen / Jaguar
Kenmore manuals will have several machines in one manual the one I found for 1941 can be found at
http://www.managemylife.com/mmh/lis_...M/L0909123.pdf It shows Super High Shank and Low Shank feet.
Most of the 158.XXX machines seem to be pretty good. Some weak points for the Kenmore machines is that some of the bobbin winders get broken and because of the kind of metal are not really fixable. It uses a 15 class bobbin, so a Sidewinder or other machines can wind bobbins.
Janey - Neat people never make the exciting discoveries I do.