Hello Nancy
If you are a member of Needlebar, the chap there, Alan, will tell you straight away what year it is.
If you go to my blog and click on the heading "Jones Family CS"at the side, you will see that it is identical to the Jones machine on there, which belongs to a lady called Maria, and which dates from 1931. You can also see the little dress I made on it - the first thing made with it for decades.
For needles, get an order in with Helen Howes
http://www.helenhowes-sewingmachines.co.uk
The lever is the stitch length adjustment, and also puts it in reverse.
There is a close up of the bobbin on the blog so you can see if you have the right one. They are not the same as Singer bobbins - one end is rounded. You can get bobbins from Helen Howes.