Linear bumper automatic .

[Nucejoe]

 Some Pierce automatic watches were powered by linear bumper selfwinding complication, I have a chance to buy this ( see photo in link below )  seller has no tool to open the back to show the movement.

Does anybody know whats ticking inside this watch? 

https://esam.ir/item/28014178

Thanks in advance.

Edited March 7, 2024 by Nucejoe

[Nucejoe]

Not many linear bumper automatics were made. 

[Nucejoe]

Image of linear bumper automatic device.

https://www.watchforum.com/threads/pierce-linear-bumper-automatic.3223/

[Nucejoe]

For future refernces,  a ETA2472 tics in this watch.

Thanks for all the help mates. 

Don't know what would have done without your help.

Edited March 7, 2024 by Nucejoe

[CYCLOPS]

I do not think that Pierce  is a bumper style auto=matic, I wonder if it looks like this one ......

[Nucejoe]

 Obviously movements of all brand were put in Pierce. 

Linear bumper automatic is rare, and almost impossible to find spare parts for. 

See linear bumper automatic, in watchforum.com link above.

Thanks for your response. 

Joe

Edited March 12, 2024 by Nucejoe

[CYCLOPS]

I know they used that type years ago and are rare and unique as are Pierce chronographs, but they were not 25 jewel movements, the watch you show for sale is new than the linear in my opinion....good luck either way

[spectre6000]

I'd never heard of a linear bumper before this. I love all the weird ways people have come up with to solve these problems.