An interesting incident which occurred at the counter of a prominent material house discloses a lack of mechanical knowledge on the part of some of the men in the practice of horology. There was nothing unusual about the customer who came in with his hand bag and opened it on the counter. From it he extracted a number of jobbing envelopes on which were written notations about the materials he was supposed to get. One of the envelopes was marked "balance staff" and contained a pocket watch while another was marked "mainspring" and held a baguette. The watches were still in their cases, probably just as the jeweler had received them from his retail customers.
"A mainspring for this and a staff for that," the customer asked. No further particulars were given the clerk. Promptly, the material man glanced at the names on the dials of the watches and going to his cabinets came back with one factory sealed, square, cellophane envelope containing a mainspring and a balanced staff wrapped in tissue paper.