This is the one I recently saved from going to scrap. Same model 7313 but serial number 089 1651. Guessing the year would be around late 70's. Not the original motor, which is now a 1996 Quantum. Don't know if the engine is even mounted high enough above the deck for belts to align properly as the top of the v-pulley assembly appears to sit about 50mm +/- below the deck. After a lot of cleaning, it was great to hear it start, and even better when it actually worked as a mower, although, sitting on it was a bit dodgey with the seat only having 2 legs that are attached to the frame. :-) Seems my photos can only be seen now when logged in as a member. Is that something new????