Also try a little paint stripper, since you are going to re-finish anyway. Don't sand until you try everything else because it's really easy to sand out some of the details of the number.
There are a couple of interesting details about this boat that indicate it may have been restored. The seats appear to be hand woven cane, not pressed. That would date it prior to 1940 or so. The carry thwarts may have been special ordered or added later. That was not common on the Old Town Otca.
The metal tag instead of a decal and the Old Town decal on the side of the boat may indicate a later restoration. Benson or others may know when the tags and side decals first started showing up on boats.