This sounds like an Anniversary model, drive chain on the left hand side? I think the model before had the chain on the right, they are all very similar but different. Does the bonnet have a white section on the front? Are the rear wheels held on by a single nut or 3? This is not conclusive because bits get swapped around but it might give us an idea.There is something different with the deck adjuster as well from memory. The steering setup on the Anniversary is different as well. Pics always help