Welcome, it is my sad duty to report that the scanned Old Town records stop just over 250,000 in 1984 so no one here can provide more detailed information for your serial number 261813. The hull identification number you provided confirms that it was built by the Old Town Canoe Company in December of 1984 for the 1985 model year. The information at https://www.canoetripping.net/attachments/142655/ describes it from the 1984 catalog.