Thanks kamakiri
Here some pics of the backside as you requested
Perfecto!
Awl says it should fit between late '76 and early '80, but I would generally call it '77 to '79. I should have also asked for a side pic of the saw. Should be able to split that to the earlier or latter half of that range. You could also just tell us if the seat for the saw tip has a bump or not on the backspring. A bump indicates later part of the range.