Hallo Mr. Raghunathan,

I thank you for your answer.
my english is bad, sorry.
But you understand good. If the difference per year is less than 1 minute I am glad, that is enaugh for my purpose: I have to switch ten times a day a new value for my program.
To get some seconds per program away (every day)is the easy way to calibrate the watch (no trimmer, no unit else). The crystal must run stabil but with few more Hz.

with regards
Manfred POMUTZ