Waltam 8 day, 7, 9 and 15j

[giorgio]

I have several Waltham 8 day car, travel, etc. watches. They are good movements. Most of them are 7j, some have a second dial, some a wind indicator window. I also have a 9j.

But this posting is about the same watch with a 15j movement, which I have just acquired but is missing the complete balance spring assembly, including pallet fork.

Can I use the missing parts from one of the 7j movements? Or the 9j, which seems to have jewelled pallets. They look the same, but I am just venturing in the mysterious world of watches. Or does anyone out there have a complete assembly for the Waltham 8 day, 15j? To sell, of course.

Thank you.
Giorgio

I

[giorgio]

I have several Waltham 8 day car, travel, etc. watches. They are good movements. Most of them are 7j, some have a second dial, some a wind indicator window. I also have a 9j.

But this posting is about the same watch with a 15j movement, which I have just acquired but is missing the complete balance spring assembly, including pallet fork.

Can I use the missing parts from one of the 7j movements? Or the 9j, which seems to have jewelled pallets. They look the same, but I am just venturing in the mysterious world of watches. Or does anyone out there have a complete assembly for the Waltham 8 day, 15j? To sell, of course.

Thank you.
Giorgio

I

[Tom McIntyre]

This WWII vintage example has a special balance that is monometallic non-cut temperature compensated using and Invar related alloy developed by Waltham. It is not for sale, but may help you in your searching.
http://www.awco.org/Chronometers/WalthamFlatDeck/movement2.jpg

[Andy Dervan]

Hello Giorgio,

Waltham made two versions: 7 jewel and 15 jewel size 37 movement. I believe both versions used the same escapement.

However there is a complication; there are two models: 1908 and 1925. They have different escapements. You need to determine if you have early or later model and locate the correct escapment.

Andy Dervan