Welcome aboard! Nice looking boat!
Without a hull ID it is almost impossible to determine the year.
It is one of the many TVT hulls made by Thompson. TVT = Thompson V Type. This is not a model name, it's what Thompson Boat called their hull shape. They made these boats by the thousands each year, around 12,000 per year at their peak (both factories).
Since she does not have a hull ID stamped into the wood of the transom, she probably dates from pre-1946. It was about 1946 that Thompson Boat started using a hull ID for the first time.
The Cortland plant got up and running in 1925. So, your boat probably dates from 1925 to 1946.
You can look at the brochures yourself. They are available for sale on a CD-ROM at
www.dragonflycanoe.com and
www.wcha.org.
You will see that there were dozens of models that all were nearly identical. Two inches wider was the only difference from one to the next sometimes.
Andreas