There's a quick way to figure out whether it's a 321 or 861 Speedy! With my iPhone I can capture slow-motion videos. Then it's easy to see whether the chrono-second hand moves 5 or 6 times per second.
EDIT: sorry I guess I should explain better:
145.012 with 321 has a beat rate of 18000/hour = 5 times/sec
145.022 with 861 has a beat rate of 21600/hour = 6 times/sec