Sellita Caliber SW510 M BH b

Manufacturer	Sellita
Caliber Number	SW510 M BH b
Base Caliber	SW510 M
Movement Type	Mechanical, manual-wind chronograph
Lignes	13.25”’
Diameter	30mm
Height	7mm
Jewels	23
Beat Rate	28,800 bph, 4Hz
Lift Angle	50 degrees
Acceptable Amplitude	200-315 degrees
Power Reserve	~58-63 hours
Hacking Seconds?	Yes
Quickset Calendar?	Yes
Chronograph System	Cam style
Anti-Shock Device	Incabloc
Mainspring	Niavaflex
Hairspring Collet	Nivatronic
Hand Count	5 (depending on variation)
Functions	Central hours; central minutes; central chronograph seconds hand; small running seconds at 9:00; 30 minutes chronograph counter at 3:00
Country of Manufacture	Switzerland, Swiss made
Known Models	Hanhart Pioneer 417 ES (Add your watch in the comments below…)

The Sellita Caliber SW510 M BH b is a bi-compax, no-date, manual-wind mechanical watch movement. It is Swiss made with 23 jewels and a beat rate of 28,800vph.

For more information about the SW510 M BH b, please refer to the base caliber page for the SW510 M family of movements here.

Additional Resources:

• Official SW510 M tech sheets (pdf)
• List of Sellita movements