3135 movement Question

[Lane123]

Hoping someone will be more knowledgeable than myself on this topic. I’ve recently swapped a 116610 for a newer and in much better shape 116610 and noticed some differences in the feel and function of the movement. For example the resistance when setting the time on the newer watch is noticeably stiffer than the older one. I’ve also noticed that when turning the crown counter-clockwise while setting the time it causes the second hand to twitch, it goes back to its original position once I release the crown. Also noticed that when turning the crown counter-clockwise the minute hand will move and then spring clockwise about a minute once I release the crown. It does not do either of these when turning clock-wise, albeit the resistance is firmer than the older 116610. Watch was very recently serviced by my local AD which is an authorized service center and is gaining roughly .5-1 s/d

My question - Is the above normal and does the resistance felt when setting time differ between all watches depending on how tight the cannon pinion is? If so how do you know when the cannon pinion is too tight to where it could cause issues?

[Lane123]

Seems the second hand twitch mentioned above is more common than not

[Fourthirteen]

Originally Posted by Lane123

My question - Is the above normal and does the resistance felt when setting time differ between all watches depending on how tight the cannon pinion is? If so how do you know when the cannon pinion is too tight to where it could cause issues?

Normal for a tight cannon pinion (CP). New case tube gaskets can also increase the resistance to turning the crown but wouldn’t make the hands twitch. CP is generally considered too tight if the sweep second hand runs backwards when turning back the time as some say that the stones on the pallet fork can be damaged when the watch runs backwards. A tight CP will loosen over time, especially if you often adjust the time, like if you have a multi watch rotation and it runs down between wearings. Doesn’t sound like yours is tight enough to worry about.

[Lane123]

Originally Posted by Fourthirteen

Normal for a tight cannon pinion (CP). New case tube gaskets can also increase the resistance to turning the crown but wouldn’t make the hands twitch. CP is generally considered too tight if the sweep second hand runs backwards when turning back the time as some say that the stones on the pallet fork can be damaged when the watch runs backwards. A tight CP will loosen over time, especially if you often adjust the time, like if you have a multi watch rotation and it runs down between wearings. Doesn’t sound like yours is tight enough to worry about.

I appreciate the response! Yeah the second hand does twitch counter-clockwise about half a second when turning the crown counter-clockwise while setting the time. Once I release the crown it goes back though.

Is the minute hand scenario I mentioned also related to semi-tight cannon pinion? It’s good to know it will likely loosen over time.

[Dirt]

Originally Posted by Lane123

I appreciate the response! Yeah the second hand does twitch counter-clockwise about half a second when turning the crown counter-clockwise while setting the time. Once I release the crown it goes back though.

Is the minute hand scenario I mentioned also related to semi-tight cannon pinion? It’s good to know it will likely loosen over time.

Sounds like you don't have too much to worry about.
Limit the tendancy to turn the hands backward when the watch is actually running.
Also you don't state whether the slight running backward condition is with a small number of winds into the Mainspring or a good deal of power wound into the spring.

In the past, i have noticed the running backward phenomenon is more prevalent with low power in the mainspring, but with a few more turns of power wound into the mainspring, it's impossible to make them go backward unless the cannon pinion is at the upper end of the tension spectrum. They will inevitably loosen up over time.

Otherwise your movement is seemingly operating in a typical fashion for that series of movement.
Enjoy