Changeable bobbins for shuttles “Pony”

Bobbins for sewing machines of Husqvarna type (model 120.16, Hemline) can be used as changeable bobbins for shuttles “Pony”, especially for not quit new, expanded ones. It is very convenient for such tatters as I am – who tats several things in parallel or winds the shuttle on and then decides to tat with a thread of another colour…