Ken: The Old Town canoe with serial number 137876 is a 17 foot long, CS grade, HW model with open spruce gunwales, ash decks, sponsons and a keel. It was built between June and October, 1943. The original exterior paint color was dark green. It was shipped on November 3rd, 1943 to Cleveland, Ohio. A scan of this build record can be found by following the link at the attached thumbnail image below.
Ken, It is possible that the galvanized stem bands are due to the canoe being built during WWII, when brass was in short supply everywhere except the ground in Europe, Northern Africa and the Pacific Islands. Or it may have been a replacement in later years.
You might want to take a look at the planking tacks - they may also be steel and possibly corroded to the point where you could consider replaceing them with brass.