I recently obtained a 1948 model 60 row crop with factory wide front. It has the &quot;B&quot; in the serial number. Question is - does anyone know how or where I could find production numbers for these? I have searched the web allot, and only find 2 spots where 1 guy say's... &quot;There were only 200 produced&quot;, and the other says &quot;There were 300 produced&quot;. Thanks for any help!