I think the tool kit was as supplied in the A70
I don't think a feeler gauge set was included,
I've seen some gauge sets that were just different wire thicknesses for the plugs,
Most early feeler gauge sets I've seen were about 5-7 leaves from about 10 thou to about 30 thou in a metal cover with a plastic/metal pin/swivel setup
about 1/2" wide, and about 3" long and about 1/4" thick including cover