Haven't found the container of "swan shot" but did find a steel tool box made for a Skilsaw packed with boxes of shotgun shells. Dear old Dad had cold chiseled out the interior brackets of the box that had held the saw and accessories and packed it with boxes of shotgun shells. Six of the white Super-X boxes of 12-gauge 3-inch compression formed 1 5/8 ounce loads, three #4 and three #6. The ratty remains of one of the three late 1930s vintage Remington ARROW EXPRESS 12-gauge 3-inch 1 5/8 ounce shells that came with my Super-Fox when I got it the summer of 1963. This box was #6 shot and still has 14 shells. As I recall the other two boxes were #4 and #5 shot. The odd thing is two boxes of 10-gauge shells. A 1940s vintage box of Remington Express #4s, and this 1933 to 1935 vintage Winchester REPEATER Super-Speed shells --
REPEATER Super-Speed 10-gauge 01.jpeg
REPEATER Super-Speed 10-gauge 02.jpeg
REPEATER Super-SPEED 10-gauge 03.jpeg
While I do recall my Father briefly owning a couple of different 10-gauges, I don't remember him ever hunting with either of them -- a Syracuse L.C. Smith and a Manhatten Arms.