Video: a question on 5270/ 5170 chronograph second hand

[henryjoeng]

Dear All,

I have come across a thread and video from a 5170 owner in another forum, who noticed a very small pause of the chronograph hand while passing the 0/60 second mark

I found the same behaviour in my 5270 (which share the same CH29 based caliber). It does not happen in each and every time, but in around half of the occasions. The pause is very subtle, but if you deliberately look for it at the 0/60 second mark, it can be seen. Hence I did not notice it after wearing my 5270 for few months, until I read that post.

Recently I met a staff of the PP service center at a horology event and he told me that it is normal for the CH29 caliber to have this very slight pause of the chronograph second hand while passing the 0/60 second mark in some of the time, which may be related to the power diversion to the instantaneous minute counter.

It will be great if other fellow 5270/ 5170 owners can share their experience.

I have attached a video of my 5270 showing the subtle pause of chronograph second hand. The resolution of video can be selected to HD.

https://youtu.be/oU_PPusIFzc

Thanks.
Henry