This canoe appears to have had the wrong number stamped on one or both stems and was later repaired by cutting off the decks/points at each end. Serial number errors are rare but these numbers were stamped by hand, one digit at a time. Tom Seavey has recently restored an Old Town boat with a single serial number digit wrong on one end. This canoe may have also had outside stems originally.
The Old Town canoes with serial numbers 117420, 117421, 117422, 117423, and 117429 are all 16 foot long canoes as shown below. You may be able to identify yours by checking for other clues. Is there any sign that a floor rack or mast step was once on the bottom? Is the outer edge of the stem unusually broad (i.e. wider than the stem band)? The stern seat may be the only original part of the trim so is it ash, oak, mahogany, or something else? What type(s) of wood were used for the long thwarts and do they look the same as the stern seat?
The rails, bow seat, and short carry thwarts all appear to be newer than the rest of the canoe. It is not unusual to have an order number crossed out and replaced with another. This simply means that they couldn't find the canoe quickly when it was time to ship it for the first order so it shipped later with another order. This would be especially true in the case of a serial number error which means that there may have been two completely different canoes in inventory with the same number.
My guess is that you probably have the canoe that was assigned serial number 117423 which originally had oak trim and outside stems.
Benson