1978 O'Day Daysailers Catalog
This catalog, from my own collection, is 14 pages and focuses solely on the Daysailing boats, including the O'Day 12, the Widgeon, Javelin, Day Sailer, and Mariner. This is one of the last advertisements of the Mariner as they halted production the following year.
This specific catalog is stamped by "Nelson's Sailing Yachts", based in Somers Point, New Jersey (no longer in business).