The 1973 chronograph caliber, with a pin anchor, named BFG 598, is a 13.5-line movement that existed in 1 or 17-jewel versions and had three pushers at 2 o'clock, 4 o'clock, and 8 o'clock.
Its operation was quite complex, as it had no fewer than three counters and seven hands: a 5-hour counter at 3 o'clock, a permanent small seconds hand at 6 o'clock, a 30-minute counter at 9 o'clock, and, in addition to the hours and minutes, another permanent central seconds hand and the chronograph seconds hand. The first push-button at 2 o'clock starts and stops the central seconds hand. The second push-button at 4 o'clock resets the watch after stopping, but also activates the flyback function. The third push-button exclusively activates the flyback function for all three counters, which therefore operate independently for timing long periods.
The BFG 598 caliber was first marketed by Baumgartner under its Uniwa and BFG brands, then from 1975 by Dolmy [7], which offered a version with a jeweled anchor, and Ilona for a Yachting model with a waterproof plastic case and a subdivided minute counter for regatta starts.
Baumgartner did not survive the quartz crisis and went bankrupt in 1981.