Patek Philippe

I'm interested in the PP5170 and had a question. The instruction book on their website says that it has a Dynamometric winding crown that will start to click when it's full. I was just comparing this to the PP5270 which I believe has the same movement CH ... 

The 5170 clicks when you try to "overwind" it. As I do not have a 5270 (so far) I cannot help you there. As to the different metals, I guess no one knows, except some PP employees :-) Best regards Georg

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Yes they are different. I own both and the 5270 comes to a stop, while the 5170 you get a feedback to stop. I was also curious about this as I thought they were based on the same movement.

Thanks for the info!

The 215 movement in my 5134 (last version) also has a mechanism to prevent over winding which clicks when it is fully would. The winding mechanism is smooth like butter. beautiful.

was the first model to incorporate this winding feature. I am also a little confused why the 5270 does not incorporate this great feature.