Good evening. I have bought a simplicity walk behind tractor from a picture a guy showed me.He said it was for sale,ran,just tuned up,a 1945?? Model "B" with a B&S 1.5 hp engine.When i asked how much,he said $25.00 and i said OK.My first problem is, i don't know much about this tractor. I would like to know: (1) how do i know what attachments will work with what i have.(2)Are they called implements or attachments.(3) do they have serial#s or will any walk behind hookup fit the Model "B".(4) when u download a manual is the long numbers in the title on the attachment .I have been around farm equipment for all of my life(58yrs) and i have never owned a walk behind.I look forward to learning a lot from this site.Thank you for any answers.