Centre Second Flyback Chronograph 44mm Pocket Watch Movement 
by Nicole, Nielsen & Co dates back to circa 1864,  
retailed by Mac Donnell & Co, Sydney (signed to the dial)
 
Invented & patented by A. Nielsen, 
a flyback chronograph is a type of watch movement that
enables the chronograph function to be reset and 
restarted instantly with a single button press. 
Unlike a standard chronograph,
which requires three separate steps—stopping, resetting, and starting—
the flyback mechanism combines all three into one seamless action.
  
With a white porcelain regulator format dial, 
featuring original hands, subsidiary seconds at 9 o'clock, 
hour indication subsidiary dial at 3 o'clock, 
minutes and the chronograph indications are 
on the outer radial dial which features 5-minute makers.
 
Manual Movement is engraved 
“Nielsen Capt 14 Soho Square, London” and numbered 7602