Set I - Real Netting
"for fixing to both goals, together with lime adhesive tape for covering posts etc, and full instructions for assembling."

The very first Subbuteo goals had card nets, but real netting had arrived by 1949. This set was just the two pieces of netting, to allow you to update the older goals. The deluxe metal goals had lime plastic piping covering the posts/crossbar, so the tape in this set duplicated that effect.