I would be surprised that any true steelies (hallow) were hand made, in any amount or big numbers. Most or all the mechanical motion antique marble toys I have or seen, need weight to work. The hallow steelies would not be heavy enough for gravity to make the toy operate. Many of the older mechanical marble toys had stone or heavy clay marbles. Most of these were at least 3/4, 7/8, or one inch marbles. I have three of the Bowler Andy Mills, three Panama Pile drivers, and others. I have tried glass marbles in them and they are not enough weight to make the toy operate. These older metal mechanical marble toys were made before any amount of glass machine marbles were in production. The Panama Plie Drivers(two versions)were made about 1910. There may be a old toy that used a hallow steelie to make it work ?