Your pictures don't show a mid deck so my guess is that you may have the Old Town boat with serial number 151948. This is a 16 foot long, AA (or top) grade, canvas covered sea model boat with a keel, outside stems, a floor rack, bilge keels, narrow board seat and a bang plate along the full length of the keel. It was built between November, 1948 and January, 1949. The original exterior paint color was dark green with G. S. (Guide's Special) green. It shipped on February 23rd, 1949 to Sanford, Maine. The back side of the record shows that it returned for repairs on February 25th, 1953 and was shipped back on April 4th, 1953. Scans showing both sides of this build record can be found by following the links behind the attached thumbnail images below.
It is also possible that you could have another number or manufacturer if this description don't match your boat. Feel free to reply here if you have any other questions.
Benson