the subdials on the zenith are as follows:

• 3:00 = 30 minute chrono register
  
• 6:00 = 12 hour chrono register
  
• 9:00 = continuous 60 seconds register
  

the subdials on this T-H are as follows:

• 3:00 = continuous 60 seconds register
  
• 6:00 = 12 hour chrono register
  
• 9:00 = 30 minute chrono register
  

note the swapped registers btw 3:00 and 9:00.

a well-priced el primero jewel becomes a lunchmeat 2894. oh well...