Hi John!

I don't know how the pivots are on the 7Sxx, but on other calibers usgind Diafix, the pivots are not conical, they are straight. About the lenght, I noticed that comparing the wheels on different calibers. For example, caliber 7005 (17j) have different parts numbers for the escape and 3rd wheels from the 7006 (19j due to two upper Diafix for 3rd and escape wheels). I decided to take both side by side to compare: the pivots on the 7006 are not conical, they are straight, even on the Diafix side. The difference compared to the wheels of the 7005 is the axle lenght. The one with longer axle don't even fit the other movement: you can fell it is longer when you try to put the plete, when mounting it.
I found it strange too, because I expected to see conical pivots, as far as I learned.

Another example: the 6119 caliber have different part number for the escape wheel, because it have upper and lower Diafix. The escape wheel part number on the 17j 6106 and on the 6105 are the same, different to the 6119. That's the clue that they have one escape wheel for calibers without Diafix (6106 17j and 6105), and another escape wheel for 6119. I did not compared the 6105 escape wheel to the 6119, but I serviced a lot of 6119, and none of them have conical pivots on the escape wheel, despite the use of Diafix.
So I have a little impression that Seiko do not use conical pivots on wheels, even when they have cap jewels.

And the only different that I found between a caped and a non caped wheel is the axle lenght.

Any professional watchmaker ever noticed that?

Regards,

Adriano

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